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WildFly Cookbook by Luigi Fugaro

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Checking JVM memories – heap-size and all

In this recipe, we will learn how to get the JVM memory information with regard to heap-size, non heap-size, metaspace size (PermGen until Java 7), eden, old, and survivor, by invoking a command to the CLI. There is a command for each of them.

Getting ready

Remember I'm running WildFly remotely, bound to 192.168.59.103 as IP. WildFly is already up and running.

How to do it…

We will walk through the "heap", "non-heap", "metaspace" (PermGen until Java 7), "eden", "old", and the "survivor" area memories, separately.

Heap

For information on heap memory, perform the following steps:

  1. Open a new terminal window and do as follows:
    $ cd $WILDFLY_HOME $ ./bin/jboss-cli.sh -c --controller=192.168.59.103:9990 --user=wildfly ...

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