Hi, We have 50 EJB3 beans and had this issue. I guess you read my post on this about how we fixed it ? Running jstat on our app now levels out at about 50MB (put we need to prime the VM with about 70MB at start up). Are you sure you patched the jboss as per my script ? Also can you confirm that in production your not doing hot deployments. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041906#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...