setting right HEAP metrics

[sunlinux]

hi
Server : RHEL linux with 4 GB Ram
Jboss 4.2.2 GA

memory consumed by process
RSS VSIze
358560 937004 0.0 8.6 /home/spsadm/data/jdk1.5.0_16/bin/java -Dprogram.name=run.sh -server -Xms128m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Djava.net.preferIPv4Stack=true -Djava.endorsed.dirs=/data/jboss/lib/endorsed -classpath /jboss/bin/run.jar:/home/spsadm/data/jdk1.5.0_16/lib/tools.jar org.jboss.Main -b abc

after seeing above pls suggest what Xms n Xms size Do I use for optimal performance . any other tweak you may suggest

issue is RAM continuously eaten by jboss where GC frees a little or sm times does not .

[peterj]

You cannot look at Linux metrics and from there determine what your heap settings should be. There are many posts in this forum that discuss heap sizing, I will leave you to discover a few of them.

Regarding "or sm times does not", what is "sm'? I don't recognize the sm utility, and I doubt you mean this one: http://linux.die.net/man/8/sm