Introduction
The following are the events for the OpenJDK 12 (jdk-12.0.2+10, 25-September-2024). The events are collected from the event configuration and the source code. Visit jfreventcollector for more information. this is also the place you can contribute additional event descriptions, if you don't want to contribute them directly to the OpenJDK. The site generator lives on GitHub too.
This page is maintained by Johannes Bechberger of the SapMachine team at SAP and contributors.
Some events have fake end times / durations, these are hidden in the event description here.
Flight Recorder
DumpReason
default profiling startTime 11 17 21 23 24
Category: Flight Recorder
Who requested the recording and why
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| reason | string | Reason Reason for writing recording data to disk |
| recordingId | int | Recording Id Id of the recording that triggered the dump, or -1 if it was not related to a recording |
DataLoss
default profiling startTime 11 17 21 23 24
Category: Flight Recorder
Data could not be copied out from a buffer, typically because of contention
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| amount | ulong: bytes | Amount Amount lost data |
| total | ulong: bytes | Total Total lost amount for thread |
ActiveRecording
default profiling startTime duration stackTrace 11 17 21 23 24
Source src/jdk.jfr/share/classes/jdk/jfr/events/ActiveRecordingEvent.java
Category: Flight Recorder
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| id | long | Id |
| name | string | Name Consider contributing a description to jfreventcollector. |
| destination | string | Destination Consider contributing a description to jfreventcollector. |
| maxAge | long: millis | Max Age |
| maxSize | long: bytes | Max Size |
| recordingStart | long: epochmillis | Start Time |
| recordingDuration | long: millis | Recording Duration |
Examples 3
| destination | string | [...]/code/experiments/jfreventcollector/jfr/sample_UseParallelGC.jfr
|
|---|---|---|
| id | long | 1
|
| maxAge | long: millis | 9223372036854775807
|
| maxSize | long: bytes | 262144000
|
| name | string | 1
|
| recordingDuration | long: millis | 9223372036854775807
|
| recordingStart | long: epochmillis | 1702899886817
|
| stackTrace | StackTrace | null
|
| startTime | long: millis | 39217883625
|
| destination | string | [...]/code/experiments/jfreventcollector/jfr/sample_UseG1GC.jfr
|
|---|---|---|
| id | long | 1
|
| maxAge | long: millis | 9223372036854775807
|
| maxSize | long: bytes | 0
|
| name | string | 1
|
| recordingDuration | long: millis | 9223372036854775807
|
| recordingStart | long: epochmillis | 1702902685041
|
| stackTrace | StackTrace | null
|
| startTime | long: millis | 669832834
|
| destination | string | [...]/code/experiments/jfreventcollector/jfr/sample_UseSerialGC.jfr
|
|---|---|---|
| id | long | 1
|
| maxAge | long: millis | 9223372036854775807
|
| maxSize | long: bytes | 262144000
|
| name | string | 1
|
| recordingDuration | long: millis | 9223372036854775807
|
| recordingStart | long: epochmillis | 1702899981921
|
| stackTrace | StackTrace | null
|
| startTime | long: millis | 40015959333
|
ActiveSetting
default profiling startTime duration stackTrace 11 17 21 23 24
Source src/jdk.jfr/share/classes/jdk/jfr/events/ActiveSettingEvent.java
Category: Flight Recorder
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| id | long | Event Id |
| name | string | Setting Name |
| value | string | Setting Value |
Examples 3
JVM
JVMInformation
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine
Description of JVM and the Java application
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| jvmName | string | JVM Name |
| jvmVersion | string | JVM Version |
| jvmArguments | string | JVM Command Line Arguments |
| jvmFlags | string | JVM Settings File Arguments |
| javaArguments | string | Java Application Arguments |
| jvmStartTime | long: epochmillis | JVM Start Time |
| pid | long | Process Identifier |
Examples 3
| javaArguments | string | [...]/code/experiments/jfreventcollector/.cache/renaissance.jar -t 5 -r 1 all
|
|---|---|---|
| jvmArguments | string | -XX:StartFlightRecording=filename=[...]/code/experiments/jfreventcollector/jfr/sample_UseSerialGC.jfr,settings=[...]/code/experiments/jfreventcollector/.cache/jfc.jfc -XX:+UseSerialGC
|
| jvmFlags | string | null
|
| jvmName | string | OpenJDK 64-Bit Server VM
|
| jvmStartTime | long: epochmillis | 1702899981604
|
| jvmVersion | string | OpenJDK 64-Bit Server VM (21.0.1+12-LTS) for bsd-aarch64 JRE (21.0.1+12-LTS), built on 2023-10-17T00:00:00Z by "admin" with clang Apple LLVM 12.0.0 (clang-1200.0.32.29)
|
| pid | long | 14273
|
| startTime | long: millis | 364229792
|
| javaArguments | string | [...]/code/experiments/jfreventcollector/.cache/renaissance.jar -t 5 -r 1 all
|
|---|---|---|
| jvmArguments | string | -XX:StartFlightRecording=filename=[...]/code/experiments/jfreventcollector/jfr/sample_UseG1GC.jfr,settings=[...]/code/experiments/jfreventcollector/.cache/jfc.jfc -XX:+UseG1GC
|
| jvmFlags | string | null
|
| jvmName | string | OpenJDK 64-Bit Server VM
|
| jvmStartTime | long: epochmillis | 1702902684442
|
| jvmVersion | string | OpenJDK 64-Bit Server VM (21.0.1+12-LTS) for bsd-aarch64 JRE (21.0.1+12-LTS), built on 2023-10-17T00:00:00Z by "admin" with clang Apple LLVM 12.0.0 (clang-1200.0.32.29)
|
| pid | long | 21922
|
| startTime | long: millis | 12862175084
|
| javaArguments | string | [...]/code/experiments/jfreventcollector/.cache/renaissance.jar -t 5 -r 1 all
|
|---|---|---|
| jvmArguments | string | -XX:StartFlightRecording=filename=[...]/code/experiments/jfreventcollector/jfr/sample_UseParallelGC.jfr,settings=[...]/code/experiments/jfreventcollector/.cache/jfc.jfc -XX:+UseParallelGC
|
| jvmFlags | string | null
|
| jvmName | string | OpenJDK 64-Bit Server VM
|
| jvmStartTime | long: epochmillis | 1702899886436
|
| jvmVersion | string | OpenJDK 64-Bit Server VM (21.0.1+12-LTS) for bsd-aarch64 JRE (21.0.1+12-LTS), built on 2023-10-17T00:00:00Z by "admin" with clang Apple LLVM 12.0.0 (clang-1200.0.32.29)
|
| pid | long | 13981
|
| startTime | long: millis | 422523083
|
InitialSystemProperty
JVM: Class Loading
ClassLoad
startTime duration eventThread stackTrace 11 17 21 23 24
Category: Java Virtual Machine / Class Loading
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | stackTrace | threshold |
|---|---|---|---|
| default | false | true | 0 ms |
| profiling | false | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| loadedClass | Class | Loaded Class Consider contributing a description to jfreventcollector. |
| definingClassLoader | ClassLoader | Defining Class Loader Consider contributing a description to jfreventcollector. |
| initiatingClassLoader | ClassLoader | Initiating Class Loader Consider contributing a description to jfreventcollector. |
Examples 3
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | bootstrap
|
| type | Class | null
|
| initiatingClassLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| loadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/text/DecimalFormatSymbols
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/text
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 22
|
| lineNumber | int | 2032
|
| method | Method | |
| descriptor | string | (Ljava/util/Locale;)Ljava/text/DecimalFormatSymbols;
|
| hidden | boolean | false
|
| modifiers | int | 10
|
| name | string | getDecimalFormatSymbols
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/util/Formatter
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/util
|
| type | FrameType | Interpreted
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 725916750
|
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | bootstrap
|
| type | Class | null
|
| initiatingClassLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| loadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 16432
|
| name | string | jdk/jfr/internal/Utils$ThrottleUnit
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/jdk.jfr
|
| name | string | jdk.jfr
|
| version | string | 21.0.1
|
| name | string | jdk/jfr/internal
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 26
|
| lineNumber | int | 289
|
| method | Method | |
| descriptor | string | (Ljava/lang/String;)J
|
| hidden | boolean | false
|
| modifiers | int | 9
|
| name | string | parseThrottleValue
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | jdk/jfr/internal/Utils
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/jdk.jfr
|
| name | string | jdk.jfr
|
| version | string | 21.0.1
|
| name | string | jdk/jfr/internal
|
| type | FrameType | Interpreted
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 412508792
|
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | bootstrap
|
| type | Class | null
|
| initiatingClassLoader | ClassLoader | |
| name | string | app
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 32
|
| name | string | jdk/internal/loader/ClassLoaders$AppClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | jdk/internal/loader
|
| loadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/io/ByteArrayOutputStream
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/io
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 0
|
| lineNumber | int | -1
|
| method | Method | |
| descriptor | string | (Z)[Ljava/lang/reflect/Method;
|
| hidden | boolean | false
|
| modifiers | int | 258
|
| name | string | getDeclaredMethods0
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/lang/Class
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang
|
| type | FrameType | Native
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 390436375
|
ClassDefine
startTime eventThread stackTrace 11 17 21 23 24
Category: Java Virtual Machine / Class Loading
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | stackTrace |
|---|---|---|
| default | false | true |
| profiling | false | true |
| Field | Type | Description |
|---|---|---|
| definedClass | Class | Defined Class Consider contributing a description to jfreventcollector. |
| definingClassLoader | ClassLoader | Defining Class Loader Consider contributing a description to jfreventcollector. |
Examples 3
| definedClass | Class | |
|---|---|---|
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/text/DecimalFormatSymbols
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/text
|
| definingClassLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 22
|
| lineNumber | int | 2032
|
| method | Method | |
| descriptor | string | (Ljava/util/Locale;)Ljava/text/DecimalFormatSymbols;
|
| hidden | boolean | false
|
| modifiers | int | 10
|
| name | string | getDecimalFormatSymbols
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/util/Formatter
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/util
|
| type | FrameType | Interpreted
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 726039417
|
| definedClass | Class | |
|---|---|---|
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | jdk/internal/module/ModulePatcher$PatchedModuleReader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | jdk/internal/module
|
| definingClassLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 35
|
| lineNumber | int | 802
|
| method | Method | |
| descriptor | string | (Ljava/lang/String;Ljdk/internal/loader/BuiltinClassLoader$LoadedModule;)Ljava/lang/Class;
|
| hidden | boolean | false
|
| modifiers | int | 2
|
| name | string | defineClass
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | jdk/internal/loader/BuiltinClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | jdk/internal/loader
|
| type | FrameType | Interpreted
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 478350125
|
| definedClass | Class | |
|---|---|---|
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | sun/launcher/LauncherHelper
|
| package | Package | |
| exported | boolean | false
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | sun/launcher
|
| definingClassLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| stackTrace | StackTrace | null
|
| startTime | long: millis | 380335375
|
ClassUnload
startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / Class Loading
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | false |
| Field | Type | Description |
|---|---|---|
| unloadedClass | Class | Unloaded Class Consider contributing a description to jfreventcollector. |
| definingClassLoader | ClassLoader | Defining Class Loader Consider contributing a description to jfreventcollector. |
Examples 3
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| startTime | long: millis | 4558738292
|
| unloadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | true
|
| modifiers | int | 4144
|
| name | string | org.apache.spark.internal.config.package$$$Lambda+0x0000000800374ab8/806572546
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | org/apache/spark/internal/config
|
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| startTime | long: millis | 5993906709
|
| unloadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | true
|
| modifiers | int | 4144
|
| name | string | org.apache.spark.internal.config.package$$$Lambda+0x0000000800372d48/1179689991
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | org/apache/spark/internal/config
|
| definingClassLoader | ClassLoader | |
|---|---|---|
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| startTime | long: millis | 3889446375
|
| unloadedClass | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 1537
|
| name | string | scala/runtime/java8/JFunction1$mcZI$sp
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | scala/runtime/java8
|
JVM: Code Cache
CodeCacheFull
default profiling startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / Code Cache
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| codeBlobType | CodeBlobType | Code Heap Consider contributing a description to jfreventcollector. |
| startAddress | ulong: address | Start Address |
| commitedTopAddress | ulong: address | Commited Top |
| reservedTopAddress | ulong: address | Reserved Top |
| entryCount | int | Entries |
| methodCount | int | Methods |
| adaptorCount | int | Adaptors |
| unallocatedCapacity | ulong: bytes | Unallocated |
| fullCount | int | Full Count |
CodeCacheStatistics
default profiling startTime every chunk 11 17 21 23 24
Category: Java Virtual Machine / Code Cache
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | everyChunk |
| profiling | true | everyChunk |
| Field | Type | Description |
|---|---|---|
| codeBlobType | CodeBlobType | Code Heap Consider contributing a description to jfreventcollector. |
| startAddress | ulong: address | Start Address |
| reservedTopAddress | ulong: address | Reserved Top |
| entryCount | int | Entries |
| methodCount | int | Methods |
| adaptorCount | int | Adaptors |
| unallocatedCapacity | ulong: bytes | Unallocated |
| fullCount | int | Full Count |
Examples 3
CodeCacheConfiguration
default profiling startTime end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Code Cache
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| initialSize | ulong: bytes | Initial Size |
| reservedSize | ulong: bytes | Reserved Size |
| nonNMethodSize | ulong: bytes | Non-nmethod Size |
| profiledSize | ulong: bytes | Profiled Size |
| nonProfiledSize | ulong: bytes | Non-profiled Size |
| expansionSize | ulong: bytes | Expansion size |
| minBlockLength | ulong: bytes | Minimum Block Length |
| startAddress | ulong: address | Start Address |
| reservedTopAddress | ulong: address | Reserved Top |
Examples 3
| expansionSize | ulong: bytes | 65536
|
|---|---|---|
| initialSize | ulong: bytes | 2555904
|
| minBlockLength | ulong: bytes | 6
|
| nonNMethodSize | ulong: bytes | 5839564
|
| nonProfiledSize | ulong: bytes | 122909338
|
| profiledSize | ulong: bytes | 122909338
|
| reservedSize | ulong: bytes | 251658240
|
| reservedTopAddress | ulong: address | 4771921920
|
| startAddress | ulong: address | 4520263680
|
| startTime | long: millis | 58734928042
|
| expansionSize | ulong: bytes | 65536
|
|---|---|---|
| initialSize | ulong: bytes | 2555904
|
| minBlockLength | ulong: bytes | 6
|
| nonNMethodSize | ulong: bytes | 5839564
|
| nonProfiledSize | ulong: bytes | 122909338
|
| profiledSize | ulong: bytes | 122909338
|
| reservedSize | ulong: bytes | 251658240
|
| reservedTopAddress | ulong: address | 5217714176
|
| startAddress | ulong: address | 4966055936
|
| startTime | long: millis | 60345400708
|
| expansionSize | ulong: bytes | 65536
|
|---|---|---|
| initialSize | ulong: bytes | 2555904
|
| minBlockLength | ulong: bytes | 6
|
| nonNMethodSize | ulong: bytes | 5839564
|
| nonProfiledSize | ulong: bytes | 122909338
|
| profiledSize | ulong: bytes | 122909338
|
| reservedSize | ulong: bytes | 251658240
|
| reservedTopAddress | ulong: address | 4733009920
|
| startAddress | ulong: address | 4481351680
|
| startTime | long: millis | 40031140833
|
JVM: Code Sweeper
SweepCodeCache
default profiling startTime duration eventThread 11 17 until JDK 20
Category: Java Virtual Machine / Code Sweeper
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 100 ms |
| profiling | true | 100 ms |
| Field | Type | Description |
|---|---|---|
| sweepId | int | Sweep Identifier |
| sweptCount | uint | Methods Swept |
| flushedCount | uint | Methods Flushed |
| zombifiedCount | uint | Methods Zombified |
CodeSweeperStatistics
default profiling startTime every chunk 11 17 until JDK 20
Category: Java Virtual Machine / Code Sweeper
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | everyChunk |
| profiling | true | everyChunk |
| Field | Type | Description |
|---|---|---|
| sweepCount | int | Sweeps |
| methodReclaimedCount | int | Methods Reclaimed |
| totalSweepTime | Tickspan | Time Spent Sweeping |
| peakFractionTime | Tickspan | Peak Time Fraction Sweep |
| peakSweepTime | Tickspan | Peak Time Full Sweep |
CodeSweeperConfiguration
default profiling startTime end of every chunk 11 17 until JDK 20
Category: Java Virtual Machine / Code Sweeper
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| sweeperEnabled | boolean | Code Sweeper Enabled |
| flushingEnabled | boolean | Code Cache Flushing Enabled |
JVM: Compiler
Compilation
default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / Compiler
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 1000 ms |
| profiling | true | 100 ms |
| Field | Type | Description |
|---|---|---|
| method | Method | Java Method |
| compileId | uint | Compilation Identifier |
| compileLevel | ushort | Compilation Level |
| succeded | boolean | Succeeded |
| isOsr | boolean | On Stack Replacement |
| codeSize | ulong: bytes | Compiled Code Size |
| inlinedBytes | ulong: bytes | Inlined Code Size |
Examples 3
| codeSize | ulong: bytes | 51704
|
|---|---|---|
| compileId | uint | 30764
|
| compileLevel | ushort | 3
|
| inlinedBytes | ulong: bytes | 1239
|
| isOsr | boolean | false
|
| method | Method | |
| descriptor | string | (Ljava/nio/ByteBuffer;)I
|
| hidden | boolean | false
|
| modifiers | int | 1
|
| name | string | read
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 32
|
| name | string | sun/nio/ch/SocketChannelImpl
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | sun/nio/ch
|
| startTime | long: millis | 78400531500
|
| succeded | boolean | true
|
| codeSize | ulong: bytes | 1272
|
|---|---|---|
| compileId | uint | 14523
|
| compileLevel | ushort | 4
|
| inlinedBytes | ulong: bytes | 1
|
| isOsr | boolean | false
|
| method | Method | |
| descriptor | string | (Lio/netty/handler/codec/http2/DefaultHttp2Connection;ILio/netty/handler/codec/http2/Http2Stream$State;)V
|
| hidden | boolean | false
|
| modifiers | int | 0
|
| name | string | <init>
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 32
|
| name | string | io/netty/handler/codec/http2/DefaultHttp2Connection$DefaultStream
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | io/netty/handler/codec/http2
|
| startTime | long: millis | 30006388584
|
| succeded | boolean | true
|
| codeSize | ulong: bytes | 1152
|
|---|---|---|
| compileId | uint | 15911
|
| compileLevel | ushort | 4
|
| inlinedBytes | ulong: bytes | 765
|
| isOsr | boolean | false
|
| method | Method | |
| descriptor | string | (Ljava/lang/Object;)Ljava/lang/Object;
|
| hidden | boolean | false
|
| modifiers | int | 17
|
| name | string | $plus$colon
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 1057
|
| name | string | scala/collection/AbstractSeq
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | scala/collection
|
| startTime | long: millis | 45946380250
|
| succeded | boolean | true
|
CompilerPhase
default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / Compiler
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 60 s |
| profiling | true | 10 s |
| Field | Type | Description |
|---|---|---|
| phase | CompilerPhaseType | Compile Phase |
| compileId | uint | Compilation Identifier |
| phaseLevel | ushort | Phase Level |
CompilationFailure
profiling startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / Compiler
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| failureMessage | string | Failure Message |
| compileId | uint | Compilation Identifier |
Examples 3
CompilerInlining
startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / Compiler / Optimization
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | false |
| Field | Type | Description |
|---|---|---|
| compileId | uint | Compilation Identifier |
| caller | Method | Caller Method |
| callee | CalleeMethod struct | Callee Method |
| succeeded | boolean | Succeeded |
| message | string | Message |
| bci | int | Byte Code Index |
Examples 3
| bci | int | 3
|
|---|---|---|
| callee | CalleeMethod | |
| descriptor | string | (Ljava/lang/AbstractStringBuilder;Ljava/lang/Void;)V
|
| name | string | <init>
|
| type | string | java/lang/String
|
| caller | Method | |
| descriptor | string | (Ljava/lang/StringBuilder;)V
|
| hidden | boolean | false
|
| modifiers | int | 1
|
| name | string | <init>
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/lang/String
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang
|
| compileId | uint | 1421
|
| message | string | callee is too large
|
| startTime | long: millis | 360803125
|
| succeeded | boolean | false
|
| bci | int | 2
|
|---|---|---|
| callee | CalleeMethod | |
| descriptor | string | (Ljava/lang/String;)Ljava/lang/AbstractStringBuilder;
|
| name | string | append
|
| type | string | java/lang/AbstractStringBuilder
|
| caller | Method | |
| descriptor | string | (Ljava/lang/String;)Ljava/lang/StringBuilder;
|
| hidden | boolean | false
|
| modifiers | int | 1
|
| name | string | append
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/lang/StringBuilder
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang
|
| compileId | uint | 1455
|
| message | string | callee is too large
|
| startTime | long: millis | 414664792
|
| succeeded | boolean | false
|
| bci | int | 94
|
|---|---|---|
| callee | CalleeMethod | |
| descriptor | string | (B)V
|
| name | string | putUncheckedByte
|
| type | string | jdk/jfr/internal/event/EventWriter
|
| caller | Method | |
| descriptor | string | (J)V
|
| hidden | boolean | false
|
| modifiers | int | 2
|
| name | string | putUncheckedLong
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | jdk/jfr/internal/event/EventWriter
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/jdk.jfr
|
| name | string | jdk.jfr
|
| version | string | 21.0.1
|
| name | string | jdk/jfr/internal/event
|
| compileId | uint | 1486
|
| message | string | callee uses too much stack
|
| startTime | long: millis | 670225042
|
| succeeded | boolean | false
|
CompilerStatistics
default profiling startTime every chunk 11 17 21 23 24
Category: Java Virtual Machine / Compiler
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | 1000 ms |
| profiling | true | 1000 ms |
| Field | Type | Description |
|---|---|---|
| compileCount | int | Compiled Methods |
| bailoutCount | int | Bailouts |
| invalidatedCount | int | Invalidated Compilations |
| osrCompileCount | int | OSR Compilations |
| standardCompileCount | int | Standard Compilations |
| osrBytesCompiled | ulong: bytes | OSR Bytes Compiled |
| standardBytesCompiled | ulong: bytes | Standard Bytes Compiled |
| nmetodsSize | ulong: bytes until JDK 13 | Compilation Resulting Size |
| nmetodCodeSize | ulong: bytes until JDK 13 | Compilation Resulting Code Size |
| peakTimeSpent | long: millis | Peak Time |
| totalTimeSpent | long: millis | Total time |
Examples 3
CompilerConfiguration
default profiling startTime end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Compiler
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| threadCount | int | Thread Count |
| tieredCompilation | boolean | Tiered Compilation |
JVM: Flag
IntFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | int | Old Value |
| newValue | int | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
UnsignedIntFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | uint | Old Value |
| newValue | uint | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
LongFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | long | Old Value |
| newValue | long | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
UnsignedLongFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | ulong | Old Value |
| newValue | ulong | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
DoubleFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | double | Old Value |
| newValue | double | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
BooleanFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | boolean | Old Value |
| newValue | boolean | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
StringFlagChanged
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| oldValue | string | Old Value |
| newValue | string | New Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
IntFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | int | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | UnguardOnExecutionViolation
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 30519912292
|
| value | int | 0
|
| name | string | JavaPriority9_To_OSPriority
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 30586822667
|
| value | int | -1
|
| name | string | DeoptimizeObjectsALotThreadCountAll
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 27602499834
|
| value | int | 1
|
UnsignedIntFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | uint | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | TypeProfileLevel
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 60345414125
|
| value | uint | 111
|
| name | string | ParallelGCThreads
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 52082156083
|
| value | uint | 0
|
| name | string | UseSVE
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 12863175584
|
| value | uint | 0
|
LongFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | long | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | TieredRateUpdateMaxTime
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 676089084
|
| value | long | 25
|
| name | string | MaxLabelRootDepth
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 423471625
|
| value | long | 1100
|
| name | string | ValueMapInitialSize
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 364804875
|
| value | long | 11
|
UnsignedLongFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | ulong | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | GCTimeLimit
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 423582750
|
| value | ulong | 98
|
| name | string | PreallocatedOutOfMemoryErrorCount
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 364820250
|
| value | ulong | 4
|
| name | string | ProcessDistributionStride
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 676107167
|
| value | ulong | 4
|
DoubleFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | double | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | ZYoungCompactionLimit
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 12863270167
|
| value | double | 25.0
|
| name | string | CompileThresholdScaling
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 15845388208
|
| value | double | 1.0
|
| name | string | CompileThresholdScaling
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 423590875
|
| value | double | 1.0
|
BooleanFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | boolean | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | C1UpdateMethodData
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 423601333
|
| value | boolean | true
|
| name | string | BailoutOnExceptionHandlers
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 364842458
|
| value | boolean | false
|
| name | string | TraceRangeCheckElimination
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 676153709
|
| value | boolean | false
|
StringFlag
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / Flag
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| name | string | Name |
| value | string | Value |
| origin | FlagValueOrigin | Origin Consider contributing a description to jfreventcollector. |
Examples 3
| name | string | StartFlightRecording
|
|---|---|---|
| origin | FlagValueOrigin | Command line
|
| startTime | long: millis | 676243792
|
| value | string | filename=[...]/code/experiments/jfreventcollector/jfr/sample_UseG1GC.jfr,settings=[...]/code/experiments/jfreventcollector/.cache/jfc.jfc
|
| name | string | PerfDataSaveFile
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 30519988125
|
| value | string | null
|
| name | string | DeoptimizeOnlyAt
|
|---|---|---|
| origin | FlagValueOrigin | Default
|
| startTime | long: millis | 17899930458
|
| value | string |
JVM: GC: Collector
GarbageCollection
default profiling startTime duration 11 17 21 23 24
Category: Java Virtual Machine / GC / Collector
Garbage collection performed by the JVM
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| name | GCName | Name The name of the Garbage Collector |
| cause | GCCause | Cause The reason for triggering this Garbage Collection |
| sumOfPauses | Tickspan | Sum of Pauses Sum of all the times in which Java execution was paused during the garbage collection |
| longestPause | Tickspan | Longest Pause Longest individual pause during the garbage collection |
Examples 3
ParallelOldGarbageCollection
default profiling startTime duration 11 17 21 23 24
Category: Java Virtual Machine / GC / Collector
Appearing in: ParallelGC
Missing in: G1GC, SerialGC, ShenandoahGC, ZGC
Extra information specific to Parallel Old Garbage Collections
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| densePrefix | ulong: address | Dense Prefix The address of the dense prefix, used when compacting |
YoungGarbageCollection
default profiling startTime duration 11 17 21 23 24
Category: Java Virtual Machine / GC / Collector
Appearing in: G1GC, ParallelGC, SerialGC
Missing in: ShenandoahGC, ZGC
Extra information specific to Young Garbage Collections
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| tenuringThreshold | uint | Tenuring Threshold |
OldGarbageCollection
default profiling startTime duration 11 17 21 23 24
Category: Java Virtual Machine / GC / Collector
Appearing in: G1GC, ParallelGC, SerialGC
Missing in: ShenandoahGC, ZGC
Extra information specific to Old Garbage Collections
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
G1GarbageCollection
default profiling startTime duration 11 17 21 23 24
Category: Java Virtual Machine / GC / Collector
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Extra information specific to G1 Garbage Collections
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| type | G1YCType | Type Consider contributing a description to jfreventcollector. |
JVM: GC: Configuration
GCConfiguration
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Configuration
The configuration of the garbage collector
| Configuration | enabled | period |
|---|---|---|
| default | true | everyChunk |
| profiling | true | everyChunk |
| Field | Type | Description |
|---|---|---|
| youngCollector | GCName | Young Garbage Collector The garbage collector used for the young generation |
| oldCollector | GCName | Old Garbage Collector The garbage collector used for the old generation |
| parallelGCThreads | uint | Parallel GC Threads Number of parallel threads to use for garbage collection |
| concurrentGCThreads | uint | Concurrent GC Threads Number of concurrent threads to use for garbage collection |
| usesDynamicGCThreads | boolean | Uses Dynamic GC Threads Whether a dynamic number of GC threads are used or not |
| isExplicitGCConcurrent | boolean | Concurrent Explicit GC Whether System.gc() is concurrent or not |
| isExplicitGCDisabled | boolean | Disabled Explicit GC Whether System.gc() will cause a garbage collection or not |
| pauseTarget | long: millis | Pause Target Target for GC pauses |
| gcTimeRatio | uint | GC Time Ratio Target for runtime vs garbage collection time |
Examples 3
| concurrentGCThreads | uint | 2
|
|---|---|---|
| gcTimeRatio | uint | 12
|
| isExplicitGCConcurrent | boolean | false
|
| isExplicitGCDisabled | boolean | false
|
| oldCollector | GCName | G1Old
|
| parallelGCThreads | uint | 8
|
| pauseTarget | long: millis | -9223372036854775808
|
| startTime | long: millis | 12824331625
|
| usesDynamicGCThreads | boolean | true
|
| youngCollector | GCName | G1New
|
| concurrentGCThreads | uint | 0
|
|---|---|---|
| gcTimeRatio | uint | 99
|
| isExplicitGCConcurrent | boolean | false
|
| isExplicitGCDisabled | boolean | false
|
| oldCollector | GCName | ParallelOld
|
| parallelGCThreads | uint | 8
|
| pauseTarget | long: millis | -9223372036854775808
|
| startTime | long: millis | 75047469167
|
| usesDynamicGCThreads | boolean | true
|
| youngCollector | GCName | ParallelScavenge
|
| concurrentGCThreads | uint | 0
|
|---|---|---|
| gcTimeRatio | uint | 99
|
| isExplicitGCConcurrent | boolean | false
|
| isExplicitGCDisabled | boolean | false
|
| oldCollector | GCName | SerialOld
|
| parallelGCThreads | uint | 0
|
| pauseTarget | long: millis | -9223372036854775808
|
| startTime | long: millis | 15621221667
|
| usesDynamicGCThreads | boolean | true
|
| youngCollector | GCName | DefNew
|
GCSurvivorConfiguration
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Configuration
The configuration of the survivors of garbage collection
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| maxTenuringThreshold | ubyte | Maximum Tenuring Threshold Upper limit for the age of how old objects to keep in the survivor area |
| initialTenuringThreshold | ubyte | Initial Tenuring Threshold Initial age limit for how old objects to keep in survivor area |
Examples 3
GCTLABConfiguration
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Configuration
The configuration of the Thread Local Allocation Buffers (TLABs)
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| usesTLABs | boolean | TLABs Used If Thread Local Allocation Buffers (TLABs) are in use |
| minTLABSize | ulong: bytes | Minimum TLAB Size |
| tlabRefillWasteLimit | ulong: bytes | TLAB Refill Waste Limit |
Examples 3
GCHeapConfiguration
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Configuration
The configuration of the garbage collected heap
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| minSize | ulong: bytes | Minimum Heap Size |
| maxSize | ulong: bytes | Maximum Heap Size |
| initialSize | ulong: bytes | Initial Heap Size |
| usesCompressedOops | boolean | If Compressed Oops Are Used If compressed Oops (Ordinary Object Pointers) are enabled |
| compressedOopsMode | NarrowOopMode | Compressed Oops Mode The kind of compressed oops being used |
| objectAlignment | ulong: bytes | Object Alignment Object alignment (in bytes) on the heap |
| heapAddressBits | ubyte | Heap Address Size Heap Address Size (in bits) |
Examples 3
YoungGenerationConfiguration
default profiling startTime duration end of every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Configuration
The configuration of the young generation of the garbage collected heap
| Configuration | enabled | period |
|---|---|---|
| default | true | beginChunk |
| profiling | true | beginChunk |
| Field | Type | Description |
|---|---|---|
| minSize | ulong: bytes | Minimum Young Generation Size |
| maxSize | ulong: bytes | Maximum Young Generation Size |
| newRatio | uint | New Ratio The size of the young generation relative to the tenured generation |
Examples 3
JVM: GC: Detailed
G1MMU
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| timeSlice | long: millis | Time Slice Time slice used to calculate MMU |
| gcTime | long: millis | GC Time Time stopped because of GC during last time slice |
| pauseTarget | long: millis | Pause Target Max time allowed to be spent on GC during last time slice |
EvacuationInformation
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| cSetRegions | uint | Collection Set Regions |
| cSetUsedBefore | ulong: bytes | Collection Set Before Memory usage before GC in the collection set regions |
| cSetUsedAfter | ulong: bytes | Collection Set After Memory usage after GC in the collection set regions |
| allocationRegions | uint | Allocation Regions Regions chosen as allocation regions during evacuation (includes survivors and old space regions) |
| allocationRegionsUsedBefore | ulong: bytes | Allocation Regions Before Memory usage before GC in allocation regions |
| allocationRegionsUsedAfter | ulong: bytes | Allocation Regions After Memory usage after GC in allocation regions |
| bytesCopied | ulong: bytes | Bytes Copied |
| regionsFreed | uint | Regions Freed |
Examples 1
| allocationRegions | uint | 23
|
|---|---|---|
| allocationRegionsUsedAfter | ulong: bytes | 47185920
|
| allocationRegionsUsedBefore | ulong: bytes | 0
|
| bytesCopied | ulong: bytes | 47185920
|
| cSetRegions | uint | 188
|
| cSetUsedAfter | ulong: bytes | 0
|
| cSetUsedBefore | ulong: bytes | 394264576
|
| gcId | uint | 45
|
| regionsFreed | uint | 188
|
| startTime | long: millis | 13220241625
|
ObjectCountAfterGC
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, ParallelGC, SerialGC
Missing in: ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | false |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| objectClass | Class | Object Class Consider contributing a description to jfreventcollector. |
| count | long | Count |
| totalSize | ulong: bytes | Total Size |
Examples 3
| count | long | 1467
|
|---|---|---|
| gcId | uint | 0
|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | jdk/jfr/internal/AnnotationConstruct
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/jdk.jfr
|
| name | string | jdk.jfr
|
| version | string | 21.0.1
|
| name | string | jdk/jfr/internal
|
| startTime | long: millis | 372286000
|
| totalSize | ulong: bytes | 35208
|
| count | long | 214383
|
|---|---|---|
| gcId | uint | 28
|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | akka/actor/ChildActorPath
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | akka/actor
|
| startTime | long: millis | 17449627375
|
| totalSize | ulong: bytes | 6860256
|
G1EvacuationYoungStatistics
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Memory related evacuation statistics during GC for the young generation
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| statistics | G1EvacuationStatistics struct | Evacuation Statistics |
Examples 1
| startTime | long: millis | 33106718959
|
|---|---|---|
| statistics | G1EvacuationStatistics | |
| allocated | ulong: bytes | 457200
|
| directAllocated | ulong: bytes | 0
|
| failureUsed | ulong: bytes | 0
|
| failureWaste | ulong: bytes | 0
|
| gcId | uint | 94
|
| regionEndWaste | ulong: bytes | 0
|
| regionsRefilled | uint: bytes | 1
|
| undoWaste | ulong: bytes | 0
|
| used | ulong: bytes | 370928
|
| wasted | ulong: bytes | 1016
|
G1EvacuationOldStatistics
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Memory related evacuation statistics during GC for the old generation
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| statistics | G1EvacuationStatistics struct | Evacuation Statistics |
Examples 1
| startTime | long: millis | 25081289000
|
|---|---|---|
| statistics | G1EvacuationStatistics | |
| allocated | ulong: bytes | 0
|
| directAllocated | ulong: bytes | 0
|
| failureUsed | ulong: bytes | 0
|
| failureWaste | ulong: bytes | 0
|
| gcId | uint | 79
|
| regionEndWaste | ulong: bytes | 0
|
| regionsRefilled | uint: bytes | 0
|
| undoWaste | ulong: bytes | 0
|
| used | ulong: bytes | 0
|
| wasted | ulong: bytes | 0
|
G1BasicIHOP
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Basic statistics related to current IHOP calculation
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| threshold | ulong: bytes | Current IHOP Threshold Current IHOP threshold |
| thresholdPercentage | float: percentage | Current IHOP Threshold Current IHOP threshold in percent of old generation |
| targetOccupancy | ulong: bytes | Target Occupancy Target old generation occupancy to reach at the start of mixed GC |
| currentOccupancy | ulong: bytes | Current Occupancy Current old generation occupancy |
| recentMutatorAllocationSize | ulong: bytes | Recent Mutator Allocation Size Mutator allocation during mutator operation in the most recent interval |
| recentMutatorDuration | long: millis | Recent Mutator Duration Time the mutator ran in the most recent interval |
| recentAllocationRate | double: bytes-per-second | Recent Allocation Rate Allocation rate of the mutator in the most recent interval in bytes/second |
| lastMarkingDuration | long: millis | Last Marking Duration Last time from the end of the last initial mark to the first mixed GC |
Examples 1
| currentOccupancy | ulong: bytes | 13159536
|
|---|---|---|
| gcId | uint | 8
|
| lastMarkingDuration | long: millis | 0
|
| recentAllocationRate | double: bytes-per-second | 0.0
|
| recentMutatorAllocationSize | ulong: bytes | 0
|
| recentMutatorDuration | long: millis | 104
|
| startTime | long: millis | 1553237875
|
| targetOccupancy | ulong: bytes | 44040192
|
| threshold | ulong: bytes | 19818086
|
| thresholdPercentage | float: percentage | 0.45
|
G1AdaptiveIHOP
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Statistics related to current adaptive IHOP calculation
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| threshold | ulong: bytes | Threshold Current IHOP Threshold |
| thresholdPercentage | float: percentage | Threshold Current IHOP threshold in percent of the internal target occupancy |
| ihopTargetOccupancy | ulong: bytes | IHOP Target Occupancy Internal target old generation occupancy to reach at the start of mixed GC |
| currentOccupancy | ulong: bytes | Current Occupancy Current old generation occupancy |
| additionalBufferSize | ulong: bytes | Additional Buffer Additional buffer size |
| predictedAllocationRate | double: bytes-per-second | Predicted Allocation Rate Current predicted allocation rate for the mutator in bytes/second |
| predictedMarkingDuration | long: millis | Predicted Marking Duration Current predicted time from the end of the last initial mark to the first mixed GC |
| predictionActive | boolean | Prediction Active Indicates whether the adaptive IHOP prediction is active |
Examples 1
| additionalBufferSize | ulong: bytes | 348127232
|
|---|---|---|
| currentOccupancy | ulong: bytes | 100050408
|
| gcId | uint | 25
|
| ihopTargetOccupancy | ulong: bytes | 551865548
|
| predictedAllocationRate | double: bytes-per-second | 1.1766365773163897E8
|
| predictedMarkingDuration | long: millis | 314
|
| predictionActive | boolean | false
|
| startTime | long: millis | 6747742667
|
| threshold | ulong: bytes | 261409996
|
| thresholdPercentage | float: percentage | 0.47368422
|
PromoteObjectInNewPLAB
profiling startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, ParallelGC
Missing in: SerialGC, ShenandoahGC, ZGC
Object survived scavenge and was copied to a new Promotion Local Allocation Buffer (PLAB). Supported GCs are Parallel Scavange, G1 and CMS with Parallel New. Due to promotion being done in parallel an object might be reported multiple times as the GC threads race to copy all objects.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier Identifier signifying GC during which the object was promoted |
| objectClass | Class | Object Class Class of promoted object |
| objectSize | ulong: bytes | Object Size Size of promoted object |
| tenuringAge | uint | Object Tenuring Age Tenuring age of a surviving object before being copied. The tenuring age of an object is a value between 0-15 and is incremented each scavange the object survives. Newly allocated objects have tenuring age 0. |
| tenured | boolean | Tenured True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space |
| plabSize | ulong: bytes | PLAB Size Size of the allocated PLAB to which the object was copied |
Examples 2
| gcId | uint | 3
|
|---|---|---|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/util/jar/Attributes
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/util/jar
|
| objectSize | ulong: bytes | 16
|
| plabSize | ulong: bytes | 12032
|
| startTime | long: millis | 940168334
|
| tenured | boolean | true
|
| tenuringAge | uint | 1
|
| gcId | uint | 5
|
|---|---|---|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | java/lang/String
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang
|
| objectSize | ulong: bytes | 24
|
| plabSize | ulong: bytes | 8176
|
| startTime | long: millis | 1163392792
|
| tenured | boolean | true
|
| tenuringAge | uint | 1
|
PromoteObjectOutsidePLAB
profiling startTime eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, ParallelGC
Missing in: SerialGC, ShenandoahGC, ZGC
Object survived scavenge and was copied directly to the heap. Supported GCs are Parallel Scavange, G1 and CMS with Parallel New. Due to promotion being done in parallel an object might be reported multiple times as the GC threads race to copy all objects.
| Configuration | enabled |
|---|---|
| default | false |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier Identifier signifying GC during which the object was promoted |
| objectClass | Class | Object Class Class of promoted object |
| objectSize | ulong: bytes | Object Size Size of promoted object |
| tenuringAge | uint | Object Tenuring Age Tenuring age of a surviving object before being copied. The tenuring age of an object is a value between 0-15 and is incremented each scavange the object survives. Newly allocated objects have tenuring age 0. |
| tenured | boolean | Tenured True if object was promoted to Old space, otherwise the object was aged and copied to a Survivor space |
Examples 2
| gcId | uint | 9
|
|---|---|---|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 0
|
| name | string | [Ljava/util/concurrent/ConcurrentHashMap$Node;
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/util/concurrent
|
| objectSize | ulong: bytes | 8208
|
| startTime | long: millis | 1607661584
|
| tenured | boolean | true
|
| tenuringAge | uint | 2
|
PromotionFailed
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Promotion of an object failed
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| promotionFailed | CopyFailed struct | Promotion Failed Data |
| thread | Thread | Running thread |
EvacuationFailed
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Evacuation of an object failed
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| evacuationFailed | CopyFailed struct | Evacuation Failed Data |
ConcurrentModeFailure
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Concurrent Mode failed
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
AllocationRequiringGC
startTime eventThread stackTrace 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, ParallelGC, SerialGC
Missing in: ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | stackTrace |
|---|---|---|
| default | false | true |
| profiling | false | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | Pending GC Identifier |
| size | ulong: bytes | Allocation Size |
Examples 3
| gcId | uint | 67
|
|---|---|---|
| size | ulong: bytes | 16
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 20
|
| lineNumber | int | 223
|
| method | Method | |
| descriptor | string | (Ljava/lang/Class;Lscala/collection/Seq;)Ljava/lang/reflect/Constructor;
|
| hidden | boolean | false
|
| modifiers | int | 2
|
| name | string | matchingConstructor
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | io/reactors/Platform$Reflect$
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | io/reactors
|
| type | FrameType | Inlined
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 49340528000
|
| gcId | uint | 88
|
|---|---|---|
| size | ulong: bytes | 2048
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 11
|
| lineNumber | int | 248
|
| method | Method | |
| descriptor | string | (Ljava/lang/Object;)Lscala/Option;
|
| hidden | boolean | false
|
| modifiers | int | 1
|
| name | string | get
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | scala/collection/immutable/Map$Map1
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | scala/collection/immutable
|
| type | FrameType | JIT compiled
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 30825556542
|
| gcId | uint | 5
|
|---|---|---|
| size | ulong: bytes | 24
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 198
|
| lineNumber | int | 403
|
| method | Method | |
| descriptor | string | (Z[Z)Ljava/lang/String;
|
| hidden | boolean | false
|
| modifiers | int | 2
|
| name | string | implReadLine
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/io/BufferedReader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/io
|
| type | FrameType | Inlined
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 1168872542
|
TenuringDistribution
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, SerialGC
Missing in: ParallelGC, ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| age | uint | Age |
| size | ulong: bytes | Size |
G1HeapRegionTypeChange
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Information about a G1 heap region type change
| Configuration | enabled |
|---|---|
| default | false |
| profiling | false |
| Field | Type | Description |
|---|---|---|
| index | uint | Index |
| from | G1HeapRegionType | From Consider contributing a description to jfreventcollector. |
| to | G1HeapRegionType | To Consider contributing a description to jfreventcollector. |
| start | ulong: address | Start |
| used | ulong: bytes | Used |
Examples 1
| from | G1HeapRegionType | Eden
|
|---|---|---|
| index | uint | 67
|
| start | ulong: address | 30205280256
|
| startTime | long: millis | 1433297167
|
| to | G1HeapRegionType | Free
|
| used | ulong: bytes | 0
|
ObjectCount
startTime every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC, ParallelGC, SerialGC
Missing in: ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | period |
|---|---|---|
| default | false | everyChunk |
| profiling | false | everyChunk |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| objectClass | Class | Object Class Consider contributing a description to jfreventcollector. |
| count | long | Count |
| totalSize | ulong: bytes | Total Size |
Examples 3
| count | long | 532169
|
|---|---|---|
| gcId | uint | 34
|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| hidden | boolean | false
|
| modifiers | int | 49
|
| name | string | akka/dispatch/Envelope
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| location | string | null
|
| name | string | null
|
| version | string | null
|
| name | string | akka/dispatch
|
| startTime | long: millis | 8979422834
|
| totalSize | ulong: bytes | 12772056
|
| count | long | 1822
|
|---|---|---|
| gcId | uint | 69
|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 0
|
| name | string | [Ljava/util/HashMap$Node;
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/util
|
| startTime | long: millis | 8663866792
|
| totalSize | ulong: bytes | 2320200
|
| count | long | 869
|
|---|---|---|
| gcId | uint | 3
|
| objectClass | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 48
|
| name | string | java/lang/invoke/MemberName
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang/invoke
|
| startTime | long: millis | 976302875
|
| totalSize | ulong: bytes | 41712
|
G1HeapRegionInformation
startTime duration every chunk 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
Information about a specific heap region in the G1 GC
| Configuration | enabled | period |
|---|---|---|
| default | false | everyChunk |
| profiling | false | everyChunk |
| Field | Type | Description |
|---|---|---|
| index | uint | Index |
| type | G1HeapRegionType | Type Consider contributing a description to jfreventcollector. |
| start | ulong: address | Start |
| used | ulong: bytes | Used |
ZPageAllocation
experimental default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: ZGC
Missing in: G1GC, ParallelGC, SerialGC, ShenandoahGC
Allocation of a ZPage
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 10 ms |
| profiling | true | 10 ms |
| Field | Type | Description |
|---|---|---|
| pageSize | ulong: bytes 11 until JDK 15 | Page Size |
| usedAfter | ulong: bytes 11 until JDK 15 | Used After |
| freeAfter | ulong: bytes 11 until JDK 15 | Free After |
| inCacheAfter | ulong: bytes 11 until JDK 15 | In Cache After |
| nonBlocking | boolean | Non-blocking |
| noReserve | boolean 11 until JDK 16 | No Reserve |
ZThreadPhase
experimental default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: ZGC
Missing in: G1GC, ParallelGC, SerialGC, ShenandoahGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 0 ms |
| profiling | true | 0 ms |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| name | string | Name |
ZStatisticsCounter
experimental default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: ZGC
Missing in: G1GC, ParallelGC, SerialGC, ShenandoahGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 10 ms |
| profiling | true | 10 ms |
| Field | Type | Description |
|---|---|---|
| id | ZStatisticsCounterType | Id Consider contributing a description to jfreventcollector. |
| increment | ulong | Increment |
| value | ulong | Value |
ZStatisticsSampler
experimental default profiling startTime duration eventThread 11 17 21 23 24
Category: Java Virtual Machine / GC / Detailed
Appearing in: ZGC
Missing in: G1GC, ParallelGC, SerialGC, ShenandoahGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | threshold |
|---|---|---|
| default | true | 10 ms |
| profiling | true | 10 ms |
| Field | Type | Description |
|---|---|---|
| id | ZStatisticsSamplerType | Id Consider contributing a description to jfreventcollector. |
| value | ulong | Value |
Examples 1
| id | ZStatisticsSamplerType | Concurrent Roots JavaThreads
|
|---|---|---|
| startTime | long: millis | 745216500
|
| value | ulong | 121708
|
JVM: GC: Heap
GCHeapSummary
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Heap
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| when | GCWhen | When Consider contributing a description to jfreventcollector. |
| heapSpace | VirtualSpace struct | Heap Space Consider contributing a description to jfreventcollector. |
| heapUsed | ulong: bytes | Heap Used Bytes allocated by objects in the heap |
Examples 3
| gcId | uint | 17
|
|---|---|---|
| heapSpace | VirtualSpace | |
| committedEnd | ulong: address | 30324359168
|
| committedSize | ulong: bytes | 259588096
|
| reservedEnd | ulong: address | 34359738368
|
| reservedSize | ulong: bytes | 4294967296
|
| start | ulong: address | 30064771072
|
| heapUsed | ulong: bytes | 95291016
|
| startTime | long: millis | 1795049125
|
| when | GCWhen | After GC
|
| gcId | uint | 2
|
|---|---|---|
| heapSpace | VirtualSpace | |
| committedEnd | ulong: address | 30322196480
|
| committedSize | ulong: bytes | 257425408
|
| reservedEnd | ulong: address | 34359738368
|
| reservedSize | ulong: bytes | 4294967296
|
| start | ulong: address | 30064771072
|
| heapUsed | ulong: bytes | 32714080
|
| startTime | long: millis | 967623375
|
| when | GCWhen | Before GC
|
| gcId | uint | 23
|
|---|---|---|
| heapSpace | VirtualSpace | |
| committedEnd | ulong: address | 30691819520
|
| committedSize | ulong: bytes | 627048448
|
| reservedEnd | ulong: address | 34359738368
|
| reservedSize | ulong: bytes | 4294967296
|
| start | ulong: address | 30064771072
|
| heapUsed | ulong: bytes | 392781104
|
| startTime | long: millis | 5929721625
|
| when | GCWhen | Before GC
|
MetaspaceSummary
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Heap
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| when | GCWhen | When Consider contributing a description to jfreventcollector. |
| gcThreshold | ulong: bytes | GC Threshold |
| metaspace | MetaspaceSizes struct | Total Consider contributing a description to jfreventcollector. |
| dataSpace | MetaspaceSizes struct | Data Consider contributing a description to jfreventcollector. |
| classSpace | MetaspaceSizes struct | Class Consider contributing a description to jfreventcollector. |
Examples 3
| classSpace | MetaspaceSizes | |
|---|---|---|
| committed | ulong: bytes | 2359296
|
| reserved | ulong: bytes | 1073741824
|
| used | ulong: bytes | 2291744
|
| dataSpace | MetaspaceSizes | |
| committed | ulong: bytes | 19660800
|
| reserved | ulong: bytes | 67108864
|
| used | ulong: bytes | 19568280
|
| gcId | uint | 2
|
| gcThreshold | ulong: bytes | 22020096
|
| metaspace | MetaspaceSizes | |
| committed | ulong: bytes | 22020096
|
| reserved | ulong: bytes | 1140850688
|
| used | ulong: bytes | 21860024
|
| startTime | long: millis | 967624083
|
| when | GCWhen | Before GC
|
| classSpace | MetaspaceSizes | |
|---|---|---|
| committed | ulong: bytes | 3080192
|
| reserved | ulong: bytes | 1073741824
|
| used | ulong: bytes | 2830240
|
| dataSpace | MetaspaceSizes | |
| committed | ulong: bytes | 23396352
|
| reserved | ulong: bytes | 67108864
|
| used | ulong: bytes | 23220816
|
| gcId | uint | 28
|
| gcThreshold | ulong: bytes | 42729472
|
| metaspace | MetaspaceSizes | |
| committed | ulong: bytes | 26476544
|
| reserved | ulong: bytes | 1140850688
|
| used | ulong: bytes | 26051056
|
| startTime | long: millis | 7657987042
|
| when | GCWhen | After GC
|
| classSpace | MetaspaceSizes | |
|---|---|---|
| committed | ulong: bytes | 2490368
|
| reserved | ulong: bytes | 1073741824
|
| used | ulong: bytes | 2421352
|
| dataSpace | MetaspaceSizes | |
| committed | ulong: bytes | 20512768
|
| reserved | ulong: bytes | 67108864
|
| used | ulong: bytes | 20385384
|
| gcId | uint | 7
|
| gcThreshold | ulong: bytes | 36700160
|
| metaspace | MetaspaceSizes | |
| committed | ulong: bytes | 23003136
|
| reserved | ulong: bytes | 1140850688
|
| used | ulong: bytes | 22806736
|
| startTime | long: millis | 1228280542
|
| when | GCWhen | Before GC
|
PSHeapSummary
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Heap
Appearing in: ParallelGC
Missing in: G1GC, SerialGC, ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| when | GCWhen | When Consider contributing a description to jfreventcollector. |
| oldSpace | VirtualSpace struct | Old Space Consider contributing a description to jfreventcollector. |
| oldObjectSpace | ObjectSpace struct | Old Object Space Consider contributing a description to jfreventcollector. |
| youngSpace | VirtualSpace struct | Young Space Consider contributing a description to jfreventcollector. |
| edenSpace | ObjectSpace struct | Eden Space Consider contributing a description to jfreventcollector. |
| fromSpace | ObjectSpace struct | From Space Consider contributing a description to jfreventcollector. |
| toSpace | ObjectSpace struct | To Space Consider contributing a description to jfreventcollector. |
Examples 1
| edenSpace | ObjectSpace | |
|---|---|---|
| end | ulong: address | 34228142080
|
| size | ulong: bytes | 1299709952
|
| start | ulong: address | 32928432128
|
| used | ulong: bytes | 1299709952
|
| fromSpace | ObjectSpace | |
| end | ulong: address | 34264842240
|
| size | ulong: bytes | 36700160
|
| start | ulong: address | 34228142080
|
| used | ulong: bytes | 30365680
|
| gcId | uint | 23
|
| oldObjectSpace | ObjectSpace | |
| end | ulong: address | 30407131136
|
| size | ulong: bytes | 342360064
|
| start | ulong: address | 30064771072
|
| used | ulong: bytes | 178910352
|
| oldSpace | VirtualSpace | |
| committedEnd | ulong: address | 30407131136
|
| committedSize | ulong: bytes | 342360064
|
| reservedEnd | ulong: address | 32928432128
|
| reservedSize | ulong: bytes | 2863661056
|
| start | ulong: address | 30064771072
|
| startTime | long: millis | 10970344333
|
| toSpace | ObjectSpace | |
| end | ulong: address | 34359738368
|
| size | ulong: bytes | 77594624
|
| start | ulong: address | 34282143744
|
| used | ulong: bytes | 0
|
| when | GCWhen | Before GC
|
| youngSpace | VirtualSpace | |
| committedEnd | ulong: address | 34359738368
|
| committedSize | ulong: bytes | 1431306240
|
| reservedEnd | ulong: address | 34359738368
|
| reservedSize | ulong: bytes | 1431306240
|
| start | ulong: address | 32928432128
|
G1HeapSummary
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Heap
Appearing in: G1GC
Missing in: ParallelGC, SerialGC, ShenandoahGC, ZGC
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| gcId | uint | GC Identifier |
| when | GCWhen | When Consider contributing a description to jfreventcollector. |
| edenUsedSize | ulong: bytes | Eden Used Size |
| edenTotalSize | ulong: bytes | Eden Total Size |
| survivorUsedSize | ulong: bytes | Survivor Used Size |
| numberOfRegions | uint | Number of Regions |
JVM: GC: Metaspace
MetaspaceGCThreshold
default profiling startTime 11 17 21 23 24
Category: Java Virtual Machine / GC / Metaspace
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled |
|---|---|
| default | true |
| profiling | true |
| Field | Type | Description |
|---|---|---|
| oldValue | ulong: bytes | Old Value |
| newValue | ulong: bytes | New Value |
| updater | GCThresholdUpdater | Updater Consider contributing a description to jfreventcollector. |
Examples 3
MetaspaceAllocationFailure
default profiling startTime stackTrace 11 17 21 23 24
Category: Java Virtual Machine / GC / Metaspace
No additional description available. Write your own and contribute it to jfreventcollector or directly to the OpenJDK.
| Configuration | enabled | stackTrace |
|---|---|---|
| default | true | true |
| profiling | true | true |
| Field | Type | Description |
|---|---|---|
| classLoader | ClassLoader | Class Loader Consider contributing a description to jfreventcollector. |
| unsafeAnonymousClassLoader | boolean until JDK 15 | Unsafe Anonymous Class Loader |
| size | ulong: bytes | Size |
| metadataType | MetadataType | Metadata Type Consider contributing a description to jfreventcollector. |
| metaspaceObjectType | MetaspaceObjectType | Metaspace Object Type Consider contributing a description to jfreventcollector. |
Examples 3
| classLoader | ClassLoader | |
|---|---|---|
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| metadataType | MetadataType | Metadata
|
| metaspaceObjectType | MetaspaceObjectType | ConstMethod
|
| size | ulong: bytes | 104
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 0
|
| lineNumber | int | -1
|
| method | Method | |
| descriptor | string | (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class;
|
| hidden | boolean | false
|
| modifiers | int | 264
|
| name | string | defineClass1
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 1057
|
| name | string | java/lang/ClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/lang
|
| type | FrameType | Native
|
| … | ||
| truncated | boolean | false
|
| startTime | long: millis | 1430932917
|
| classLoader | ClassLoader | |
|---|---|---|
| name | string | null
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 33
|
| name | string | java/net/URLClassLoader
|
| package | Package | |
| exported | boolean | true
|
| module | Module | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| location | string | jrt:/java.base
|
| name | string | java.base
|
| version | string | 21.0.1
|
| name | string | java/net
|
| metadataType | MetadataType | Metadata
|
| metaspaceObjectType | MetaspaceObjectType | Method
|
| size | ulong: bytes | 88
|
| stackTrace | StackTrace | |
| frames | StackFrame | |
| bytecodeIndex | int | 0
|
| lineNumber | int | -1
|
| method | Method | |
| descriptor | string | (Ljava/lang/ClassLoader;Ljava/lang/String;[BIILjava/security/ProtectionDomain;Ljava/lang/String;)Ljava/lang/Class;
|
| hidden | boolean | false
|
| modifiers | int | 264
|
| name | string | defineClass1
|
| type | Class | |
| classLoader | ClassLoader | |
| name | string | bootstrap
|
| type | Class | null
|
| hidden | boolean | false
|
| modifiers | int | 1057
|
| name | string | java/lang/ClassLoader
|
| package | Package | |
| exported | boolean | <