I've looked at jBPM database schema. It's very normalized, which might not be too good if it does a lot of selects (joins). How does jBPM uses the DB? It probably reads process definitions and all the related tables at the process initialization (fetches them from the cache?) but what about the rest of them? Does it ever read from the log? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981400#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...