J9 Force Garbage Collection Recipe

1. For Semeru Java, replace $JAVA_HOME with the path to Java, and $PID with the process ID in (if running under a Windows Service, use a technique to run the command as the SYSTEM user):

   $JAVA_HOME/bin/jcmd $PID GC.run

2. For IBM Java >= 8.0.6.25 that is a JDK (e.g. tWAS 9.0.5.7 and above and 8.5.5.20 and above), replace $JAVA_HOME with the path to Java, and $PID with the process ID in the following command (if running under a Windows Service, use a technique to run the command as the SYSTEM user):

   $JAVA_HOME/bin/java -Xbootclasspath/a:$JAVA_HOME/lib/tools.jar openj9.tools.attach.diagnostics.tools.Jcmd $PID GC.run

   1. For example:

      $ /opt/IBM/WebSphere/AppServer/java/8.0/bin/java -Xbootclasspath/a:/opt/IBM/WebSphere/AppServer/java/8.0/lib/tools.jar openj9.tools.attach.diagnostics.tools.Jcmd 658 GC.run
      Command succeeded

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