It looks like there are two compiler threads running and two garbage collection threads. So it appears that the JSPs in the war are being compiled, those compiles are generating a lot of garbage, and the garbage collector is running. Have you set any heap settings or are you using the defaults in run.bat/run.sh? Try setting the -verbose:gc JVM argument, that will tell you how much time you are spending in garbage collection. You could change load on startup, but then would would simply be delaying the pause until the first user accesses a page. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962252#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...