Re: How long are statistics good for

[Anand Prakash]

Which version of Oracle are you using. In 8i you can set 'monitoring on' for the tables and use dbms_stats to analyze stale. (Though, I am getting error while using dbms_stats for the partitioned tables. So I have made a home made version to analyze stale). As per my calculations, package dbms_stats considers statistics stale if all DMLs affect more than 10% of number of rows.   Anand Prakash >>> [EMAIL PROTECTED] 10/23/01 11:00AM >>> We have a data-warehouse that is a combination of Snapshots and table-builds based on the snapshots. The table builds run at 4:30 am, scripts are setup to start the snapshots at 7:00am and end at 9:00pm.  At 6:30 am a script performs an analyze on ALL (except sys and system) tables in the database. If the snapshots have been running all day, should I run an analyze before I do the table builds? as opposed to after ? At what point do the statistics on a table become no good ? when a new row is added ? Thanks Darren ---------------------------------------------------------------------------- ---------------------------------------------- Darren Browett P.Eng                         This message was transmitted Systems Analyst - Information Systems                 using 100% recycled electrons City of Coquitlam P:(604)927 - 3614 E:[EMAIL PROTECTED] ---------------------------------------------------------------------------- ----------------------------------------------- -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Browett, Darren   INET: [EMAIL PROTECTED] Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051 San Diego, California        -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from).  You may also send the HELP command for other information (like subscribing).