How to get maximum memory used by java program

Question

Is there a way to get the peak memory used at any given point during a java program run? So far I've only seen solutions that give total memory consumed.

Answer 1

You can try this JDK tools for heap analyzis:

• VisualVM
• jstat (console tool )

RSS mem usage can be found on unix by comman line tools ps or top , or by JDK tool:

• jcmd <pid> VM.native_memory detail.diff (java process should be run with -XX:NativeMemoryTracking=summary JAVA_OPTS )

RSS Peak usage can be found on linux in /proc/<pid>/status file in VmHWM field ( man ).