ok , thanks.. I rethought about that and i've 2 more question.. 1) I've 2 entities Event and EventText for each Event there are many EventText EventText is an entity that I am only inserting(never update/delete) but it hold one Event and Event is an entity that can be changed once in few weeks , can I still use READ_ONLY for EventText? 2)now what about queries? I would like to query i.e. all Events that contains EventText.type=1 , can I cache this query? I thought to put TRANSACTIONAL cache on the Event entity and cache this queries , does it make sense? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970916#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...