How to trigger a full gc using JBoss CLI in EAP 6/7

Solution Verified - Updated

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 6.x
    • 7.x

Issue

  • How do I trigger a full gc using JBoss CLI in EAP 6.x/7.x?
  • Is there a command to trigger a full gc using JBoss CLI in EAP 6.x/7.x?

Resolution

Triggering a manual garbage collection is not really a good idea. It should be left to the JVM to decide when and how gc's are done.

You can execute java.lang.management.MemoryMXBean#gc() via the following CLI command.

  • standalone mode
[standalone@localhost:9999 /] /core-service=platform-mbean/type=memory:gc
{"outcome" => "success"}
  • domain mode
[domain@localhost:9999 /] /host=master/server=server-one/core-service=platform-mbean/type=memory:gc
{
    "outcome" => "success",
    "result" => undefined
}

And JMX tools like jvisualvm/jconsole allow you to trigger this, too.

Keep in mind that configurations quite often have the option "-XX:+DisableExplicitGC" which prevents a manual triggering.

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