2 Replies Latest reply on Apr 1, 2011 2:08 PM by Andi Beckar

    Generall Memory Question

    Andi Beckar Newbie

      Hi there,

      could anyone please explain the following to me.


      Settings of my JVM: (jboss4.4.2 - java 1.5.0_10)

      "-Xms128m -Xmx1536m -XX:MaxPermSize=512m -verbose:gc -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"

      # should be 2048MB


      And this is what i see when the Machine is running a few hours:

      --- snip cmd top ---

        PID USER      PR  NI  VIRT    RES   SHR    S    %CPU %MEM    TIME+     COMMAND                

      7401 jboss      25    0   2802m  1.9g   291m  S    39        11.8         33:14.50  java    

      --- snip cmd top END ---


      why are the "RES" and the "VIRT" Mem even higher than my Setting tells the JVM to be ?

      and how many jboss instances, with the above described JVM Settings, can i run on a single machine with 8GB RAM with the goal not to come in any SWAP Situations.