Hi Denny, Denny Koovakattu schrieb: > > Could it be that the execution plans are the same but work_area_policy > is set > to AUTO and the dedicated server sessions don't have sufficient memory > and the > shared server processes are using sort_area_size? How can I check that? I did set work_area_policy to manual - no change. I did set alter session sort_area_size=262144 for ded and shared tests as well - no change. Any idea is greatly appreciated. Thanks usn -- Usn's IT Blog for Linux, Oracle, Asterisk www.usn-it.de -- //www.freelists.org/webpage/oracle-l