I don't really know the configuration of the virtual machine. I just know the information by accessing by ssh: uname -a: | Linux *** 2.6.27-11-server #1 SMP Thu Jan 29 20:13:12 UTC 2009 x86_64 GNU/Linux | So yes it's a multiprocessing machine free: | total used free shared buffers cached | Mem: 1024224 175512 848712 0 3992 33020 | -/+ buffers/cache: 138500 885724 | Swap: 0 0 0 | So I think I don't really have a problem for memory usage And my JVM args are: JBoss Bootstrap Environment | | JBOSS_HOME: /apps/jboss-5.0.1.GA | | JAVA: /usr/lib/jvm/java-6-sun/bin/java | | JAVA_OPTS: -Dprogram.name=run.sh -server -Xms256m -Xmx1024m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true | | CLASSPATH: /apps/jboss-5.0.1.GA/bin/run.jar:/usr/lib/jvm/java-6-sun/lib/tools.jar | Sorry if I didn't give much information first... but actually, I didn't know what to do exactly... Because I don't have much information... no logs... no trace :'( So I will have a look to the memory usage during launching... Do you know a good tool to watch the jvm memory usage ?! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4213413#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...