Zhu, I don't think so. We don't set any session level work-area-polilcy(manual) and ours is not a shared server configuration. However our pga is bigger than pga_aggregate_target. >two situations that can lead to bigger pga than that limit: >1. someuser did alter session manually and that can work-area-polilcy manual and set some >big/huge sort/hash size. >2. shared server configurations.