an application schema dead.App schemas get upgraded on a routine basis and ,mostly, apps migrate to a newer one leaving behind the old schema. Such events are not communicated (and we try hard). As such, I estimate there are about 30% of our db storage wasted on such schemas.. I have to establish 2 facts about a schema to declare dead. 1) Schema last MODIFIED date >= 60 days. 2) Schema last ACCESS date >= 60 days. I establish first one based on DBA_TAB_MODIFICATIONS and this is good enough. The trick is in the 2nd one. If not modified, it does not mean not accessed (by same or other schemas). My options are ... - set auditing on: hard to sell due performance impact, I'll evaluate, however. - find application related table to reflect user access. inconsistent results. How are you doing it & what other options are there? ---------------------------------------- Thank you. -- //www.freelists.org/webpage/oracle-l