Hmm... I wrote a long response to this, but it strangely disappeared. I'll summarize: - Would be great if you could elaborate a little on the way creating the indexes impacted performance more than just the delete (thankfully it was not the coroner you had to call ;-)) - If you have some errors regarding the persistency, we'd be happy to help and see if there could be a reason for the error in jBPM (stacktraces e.g.) - I'm not a fan of serialzation (I've had an incompatibility once due to upgrading a jdk). If needed, I marshal the objects, or use explicit hibernate mappings - Creating an example is not trivial, but you expect 'us' to have/know tooling for debugging it.... ;-) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4249804#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...