Your config looks fine. The JBoss Cache version used in 3.2.7 is quite old; I suspect your memory problem is due to one or both of: http://jira.jboss.com/jira/browse/JBCACHE-298 http://jira.jboss.com/jira/browse/JBCACHE-308 Suggest you try upgrading JBC to either 1.2.4.SP2 (latest SP of the version that had those fixed) or 1.4.1.SP9 (latest version that *should be* compatible -- haven't tried). Both can be found at http://sourceforge.net/project/showfiles.php?group_id=22866&package_i.... Note that if you use 1.4.1.SP9 you'll need to be sure jboss-serialization.jar is in server/all/lib and you'll need to upgrade to the JGroups that comes with the JBC distribution. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4145117#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...