EJB3 (JPA) entities are managed by the JPA provider (Hibernate). The caching too is being configured through the persistence.xml files. The documentation for AS5 has been revamped :) Its available at http://www.jboss.org/ejb3/docs/ The specific chapter for EJB3 entity caching is here http://www.jboss.org/file-access/default/members/jbossejb3/freezone/docs/... P.S: I haven't heard about ejb3-entity-cache-service.xml in earlier versions too. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4249066#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...