11.2.0.2 linux 64 bit. I have a problem with some parallel queries being serialized. I am trying to determine which queries where serialized after the fact. Short of catching the query in the act via v$px_session, is there a way to identify queries that have been serialized over a longer period of time? Perhaps a query against the AWR. I have been wracking my brain on this one. Thanks for your help, Josh -- //www.freelists.org/webpage/oracle-l