Hi All, I need some advice. Overview: We have an application that reads about 5000 messages from MQ and saves it to a database. The messages make up a statement (from 1-1500 message) and need to be stored in an interim table called incomming. When all pages are received for that statement it is moved to completed. I process about 200 messages per iteration. My performance currently sucks. so 1. By default, does jboss 4.2.2 enable second level cache for JPA, or do i need to configure it in the persistence.xml? 2. Will second level cache help? 3. will the batch-size property help and what size should it be on? (my theory is that it needs to be the same about as the insert i`m performing within my transaction. 200 messages +- 300 inserts. 4. Any other ideas? Thanks Derick View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160204#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...