Weblogic: How to take a Heap dump for weblogic server in jrockit

Steps to take a Heap Dump for a weblogic server running on jrockit-

1. Run ps -ef | grep oracle or ps -ef | grep managedserver to find the process id (pid)

2. Check the java path in the process

3. Run the below command for the heap dump

/usr/local/java/bin/jrcmd 19456 print_threads >  /tmp/heap_dump.txt

19456 is the process id or pid

jrcmd is a command-line tool included with the JRockit JDK that you can use to send diagnostic commands to a running JVM process

Oracle Documentation reference -
https://docs.oracle.com/cd/E15289_01/doc.40/e15061/ctrlbreakhndlr.htm

jrcmd <jrockit pid> [<command> [<arguments>]] [-l] [-f file] [-p] -h]

• <jrockit pid> is either the process ID or the name of the Main class that runs the application.
• [<command> [<arguments>]] is any diagnostic command and its associated arguments; for example, version, print_properties, command_line.
• -l displays the counters exposed by this process. These counters are for internal use by Oracle and are not officially supported or documented.
• -f reads and executes commands from the file.
• -p lists JRockit JVM processes on the local machine.
• -h displays help.