Did you run 'free' with JBossAS running or stopped? Your max heap size is 1GB which end up using all of the RAM - how much swap space do you have? Based on your current free memory, assuming no swap, I would try reducing maxpermsize to 128m and set min and max heap to 512m - that should prevent all of the RAM from being used. Use 'top' to monitor java's memory usage as you deploy and run your app. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4213434#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...