JBoss Optimization Problem

[prajal]

I'm running jboss 3.2.6 on linux ES 3.0. Few days ago while running application i was getting OutOfMemory error in jboss log and also my site was not working at all. One of my frind suggested me that this is problem due to jboss optimization. So he suggested me to make changes in run.sh file of jboss. I have made changes and after that its working fine. Please find below changes that i had done in run.sh

earlier
JAVA_OPTS="$JAVA_OPTS -Xms328m -Xmx720m"i removed above line and add new line as below
JAVA_OPTS="$JAVA_OPTS -Xms328m -Xmx720m -XX:PermSize=64m -XX:MaxPermSize=512m"
My RAM size is 2 GB

Can anyone tell me that is this only process for jboss optimization or anything else is remaining. Also tell me that this is right process that i did ?

[peterj]

The changes you have made affect the Java heap, specifically in the area of the heap where static class information is kept. To read more about this, look at http://developers.sun.com/techtopics/mobility/midp/articles/garbagecollection2/
or just go to Sun's web site (http://java.sun.com) and search for MaxPermSize. Pay particular attention to the discussion surrounding the output given by PrintHeapAtGC -- that information will help you properly size the heap for your application.