Thanks Tim! WITH The column: MODULE, I was able to provide a lead to track this one down to one user: SELECT * FROM DBA_HIST_ACTIVE_SESS_HISTORY WHERE SQL_ID IN ( select SQL_ID from DBA_HIST_SQL_PLAN where OBJECT_NAME = 'XX_MY_MV') From: Tim Gorman <tim@xxxxxxxxx<mailto:tim@xxxxxxxxx>> Reply-To: "tim@xxxxxxxxx<mailto:tim@xxxxxxxxx>" <tim@xxxxxxxxx<mailto:tim@xxxxxxxxx>> Date: Mon, 12 Dec 2011 09:52:38 -0800 To: Anthony Ballo <anthony.ballo@xxxxxxxxxxx<mailto:anthony.ballo@xxxxxxxxxxx>>, "'oracle-l@xxxxxxxxxxxxx<mailto:'oracle-l@xxxxxxxxxxxxx>'" <oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>> Subject: Re: Mat View - used by? Look for the name of the MV in the OBJECT_NAME column of DBA_HIST_SQL_PLAN, which will give you a list of SQL_IDs, not people or users. However, you can then query DBA_HIST_ACTIVE_SESS_HISTORY for session information (including USER_ID, MODULE, ACTION, etc) based on those SQL_IDs. Just be aware that the AWR information is not an audit trail, but sampled data, so it is not perfect or definitive. But it is way, WAY, *WAY* better than nothing... :-) Happy hunting! -----Original Message----- From: Anthony Ballo [mailto:anthony.ballo@xxxxxxxxxxx] Sent: Monday, December 12, 2011 10:47 AM To: 'oracle-l@xxxxxxxxxxxxx<mailto:'oracle-l@xxxxxxxxxxxxx>' Subject: Mat View - used by? Hello, I'm trying to determine if we can lengthen the time to refresh on a particular Mat View in 10.2.0.4. Is there a way to see (via SQL?) what other code utilizes this Materialized View (like a "used by")? It is currently on a 1/48 (every half hour) refresh which seems excessive to me. The naming of the view would suggest that it is used in Discoverer reporting. Thanks, Anthony -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l