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jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary - JVM Heap Summary
How to run "jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary" tool from JDK lib\modules JImage file?
✍: FYIcenter
"jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary" tool allows you to print out heap summary of a given JVM process.
"jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary" tool is supported by the jmods\jdk.hotspot.agent.jmod module file, which is also linked into the lib\modules JImage file.
You can run the "jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary" tool using the lib\modules JImage file as described below:
fyicenter> %JDK_HOME%\bin\java --module jdk.hotspot.agent/sun.jvm.hotspot.tools.HeapSummary 5136 Summary 5136 Attaching to process ID 5136, please wait... Debugger attached successfully. Server compiler detected. JVM version is 11.0.1 using thread-local object allocation. Garbage-First (G1) GC with 2 thread(s) Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 1073741824 (1024.0MB) NewSize = 1363144 (1.2999954223632812MB) MaxNewSize = 643825664 (614.0MB) OldSize = 5452592 (5.1999969482421875MB) NewRatio = 2 SurvivorRatio = 8 MetaspaceSize = 21807104 (20.796875MB) CompressedClassSpaceSize = 260046848 (248.0MB) MaxMetaspaceSize = 268435456 (256.0MB) G1HeapRegionSize = 1048576 (1.0MB) Heap Usage: G1 Heap: regions = 1024 capacity = 1073741824 (1024.0MB) used = 60424704 (57.62548828125MB) free = 1013317120 (966.37451171875MB) 5.62748908996582% used G1 Young Generation: Eden Space: regions = 33 capacity = 49283072 (47.0MB) used = 34603008 (33.0MB) free = 14680064 (14.0MB) 70.2127659574468% used Survivor Space: regions = 7 capacity = 7340032 (7.0MB) used = 7340032 (7.0MB) free = 0 (0.0MB) 100.0% used G1 Old Generation: regions = 18 capacity = 1017118720 (970.0MB) used = 17433088 (16.62548828125MB) free = 999685632 (953.37451171875MB) 1.7139678640463918% used 23990 interned Strings occupying 1712584 bytes.
⇒ jdk.hotspot.agent/sun.jvm.hotspot.tools.jcore.ClassDump - JVM Class Dumper
⇐ jdkjdk.hotspot.agent/sun.jvm.hotspot.tools.HeapDumper - JVM Heap Dumper
2019-09-27, 1496🔥, 0💬
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