Have I mentioned this before: It's a nice feature of 10g that whenever you update the stats (legally), Oracle saves the prior values to a history table; and there is a dbms_stats that allows you do to things like: put this table's stats back to 2:30 pm last Tuesday. Regards Jonathan Lewis http://www.jlcomp.demon.co.uk The Co-operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html April 2004 Iceland http://www.index.is/oracleday.php June 2004 UK - Optimising Oracle Seminar July 2004 USA West Coast, Optimising Oracle Seminar August 2004 Charlotte NC, Optimising Oracle Seminar September 2004 USA East Coast, Optimising Oracle Seminar September2004 UK - Optimising Oracle Seminar ----- Original Message ----- From: "Connor McDonald" <hamcdc@xxxxxxxxxxx> To: <oracle-l@xxxxxxxxxxxxx> Sent: Friday, April 23, 2004 6:36 AM Subject: Re: CPU COSTING We run a job once per month to gather system stats for a couple of hours. It checks to make sure that sessions/processes are within 75% of their high water mark before commencing to (hopefully) ensure that the stats are representative. Cheers Connor ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------