Running your web app across 16 CPUs is not a good idea. Due to CPU cache issues, contention among threads, and various other issues it is usually better to run such apps while affinitized to 2, 3 or 4 CPUs (depening on your app). At least that is what we have found in our testing. In Linux, you can use the taskset utility to set affinity. I suggest adding this to the script that starts jbossas. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171548#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...