How to take heap dump and Rread, analyze heap dump file by free software VisualVM | .hprof file

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heap dump whenever an OutOfMemoryError occurs.
The -XX:+HeapDumpOnOutOfMemoryError option can be added to generate a heap dump on OutOfMemoryError. By default, the heap dump is created in a file called java_pid pid .hprof in the working directory of the VM, but we can set an alternative path using the JVM option -XX:HeapDumpPath=path.

Using a jmap & jcmd tool available with JDK

Find Java process ID
1. Windows Task Manager

2. Linux Below command
ps –ef | grep java

jmap -dump:live,format=b,file=heap.bin "pid"

heap dump file extension : .hprof
jmap -dump:live,format=b,file=heap.bin "pid"

"pid" can be replaced with the process id of the application.

Example : jmap -dump:live,format=b,file=C:\heapDump\heapDUmp.hprof 6336

Doanload link for VisualVm Application : https://visualvm.github.io/download.html

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