Thanks for Peter help. Almost all resource cannot be set for a web application. These resource setting are for global. For avoiding that one web application used all resources (memory, thread, database connection pool), the only solution is to set individual instance (JBoss AS server) for a web application so that these web applications won't affect each other. Peter, what do you think? Does anyone have good suggestion? Thanks in advance. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4244864#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...