The only limit is the amount of available heap space. To monitor the sessions, use the mbean: jboss.web:type=Manager,host=xxx,path="yyy" where 'xxx' is the binding host name, which is 'localhost' by default' and 'yyy' is the application's context. Thus there is a collection of sessions for each web applications. Interesting attributes include expiredSessions, sessionCounter, maxActiveSessions, and others. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4216389#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...