Correct. I know that. I use dbms_pool.purge to flush the plan information. I wasn't clear on that I guess. Chris -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of MacGregor, Ian A. Sent: Friday, October 12, 2012 9:59 AM To: oracle-l@xxxxxxxxxxxxx Subject: RE: Do any of you know? Taking system stats does not invalidate cursors. Statements will continue to use the same plans until they are re-parsed for other reasons, Ian A. MacGregor SLAC National Accelerator Laboratory Computing Division ________________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Christopher.Taylor2@xxxxxxxxxxxx [Christopher.Taylor2@xxxxxxxxxxxx] Sent: Friday, October 12, 2012 7:43 AM To: jonathan@xxxxxxxxxxxxxxxxxx; mwf@xxxxxxxx; niall.litchfield@xxxxxxxxx; oratune@xxxxxxxxx; breitliw@xxxxxxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: Do any of you know? When gathering SYSTEM stats, do those stats take a while to affect the query plans once they are collected? (a "while" being some "x" amount of time - I thought they would be immediate) -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l