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Generall Memory Question
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created by <a href="http://community.jboss.org/people/abeckar">Andi Beckar</a> in <i>Performance Tuning</i> - <a href="http://community.jboss.org/message/597091#597091">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi there,</p><p>could anyone please explain the following to me.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Settings of my JVM: (jboss4.4.2 - java 1.5.0_10)</p><p>"-Xms128m -Xmx1536m -XX:MaxPermSize=512m -verbose:gc -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000"</p><p># should be 2048MB</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And this is what i see when the Machine is running a few hours:</p><p>--- snip cmd top ---</p><p>  PID USER      PR  NI  VIRT    RES   SHR    S    %CPU %MEM    TIME+     COMMAND                 </p><p> 7401 jboss      25    0   2802m  1.9g   291m  S    39        11.8         33:14.50  java     </p><p>--- snip cmd top END ---</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>why are the "RES" and the "VIRT" Mem even higher than my Setting tells the JVM to be ?</p><p>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.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks</p><p>Andi <span> ;) </span></p></div>
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