Java VM Daignostic commands to run GC, Finalization,vmSystemProperties,vmVersion,vmUptime and vmCommand line

Statement - Java VM Diagnostic command
Environment - AEM 6.3 GA

Solution :

• Go to the Felix console URL: http://localhost:4502/system/console/jmx/com.sun.management%3Atype%3DDiagnosticCommand
• Below are the list operations

Operations
Return Type	Name
java.lang.String	gcClassHistogram([Ljava.lang.String; arguments) Provide statistics about the Java heap usage.
java.lang.String	gcClassStats([Ljava.lang.String; arguments) Provide statistics about Java class meta data. Requires -XX:+UnlockDiagnosticVMOptions.
java.lang.String	gcRotateLog() Force the GC log file to be rotated.
java.lang.String	gcRun() Call java.lang.System.gc().
java.lang.String	gcRunFinalization() Call java.lang.System.runFinalization().
java.lang.String	help([Ljava.lang.String; arguments) For more information about a specific command use 'help '. With no argument this will show a list of available commands. 'help all' will show help for all commands.
java.lang.String	jfrCheck([Ljava.lang.String; arguments) Checks running JFR recording(s)
java.lang.String	jfrDump([Ljava.lang.String; arguments) Copies contents of a JFR recording to file. Either the name or the recording id must be specified.
java.lang.String	jfrStart([Ljava.lang.String; arguments) Starts a new JFR recording
java.lang.String	jfrStop([Ljava.lang.String; arguments) Stops a JFR recording
java.lang.String	threadPrint([Ljava.lang.String; arguments) Print all threads with stacktraces.
java.lang.String	vmCheckCommercialFeatures() Display status of commercial features
java.lang.String	vmCommandLine() Print the command line used to start this VM instance.
java.lang.String	vmFlags([Ljava.lang.String; arguments) Print VM flag options and their current values.
java.lang.String	vmNativeMemory([Ljava.lang.String; arguments) Print native memory usage
java.lang.String	vmSystemProperties() Print system properties.
java.lang.String	vmUnlockCommercialFeatures() Unlock commercial features
java.lang.String	vmUptime([Ljava.lang.String; arguments) Print VM uptime.
java.lang.String	vmVersion() Print JVM version information.

• That's  it!