Thank you Peter. Yes. I have found all the mbeans you mentioned in that post, and monitored these attributes through jboss web console. I also took a look at the Jopr. It's nice but not suitable for us because for some reasons we are still using JDK1.4 which does not support Jopr. Pity. I am trying JBoss Profiler PI. But there is always an implicitly internal error that leads to terminate the JBoss server. Crazy.. Any other suggestions? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4233003#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...