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.
Remember I'm running WildFly remotely, bound to 192.168.59.103 as IP. WildFly is already up and running.
We will walk through the "heap", "non-heap", "metaspace" (PermGen until Java 7), "eden", "old", and the "survivor" area memories, separately.
For information on heap memory, perform the following steps:
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 --password=cookbook.2015 --command="/core-service=platform-mbean/type=memory:read-attribute(name=heap-memory-usage,include-defaults=true)" { "outcome" => "success", "result" => { "init" => 67108864L, "used" =>...