System memory usage doesn't reflect -Xmx heap settings

Solution Verified - Updated -

Issue

  • The used memory reported by the 'free -m' command doesn't reflect the -Xmx settings of my JVMs.  Does the system reserve memory for the full amount of -Xmx?  Are the processes sharing memory?
  • Testing with a base default JBoss server instance, the used memory reported by 'free -m' doesn't go up when I increase my heap size.

Environment

  • JBoss Enterprise Application Platform (EAP)
  • Red Hat Enterprise Linux (RHEL)

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