If you want to reduce communication between app server and database server for batch data processing, you may want to consider using a rule engine instead of calling stored procedure from your conversation beans. The syntax of DRL declarations is far, far more developer-friendly than any stored procedure languages I've ever seen (Oracle, MaxDB, MySQL 5+). And using a rule engine has a negative-exponential performance improvement if your application has heavy "many objects, many patterns" matching computation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4078155#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...