Create a heap dump of a Java process 

jmap -dump:format=b,file=/var/tmp/dump.hprof 1234

July 8, 2013 — bashoneliners

Explanation

  • Create a heap dump from the running Java process with PID=1234
  • The heap dump will be saved in /var/tmp/dump.hprof in binary format
  • You can open the dump with "MAT", the Memory Analyzer Tool (based on Eclipse) and identify objects that use most of the memory and potential memory leaks

For more options see jmap -h

Java memory-management
jmap