Statistics become old after a single change is made to the object. Granted adding a single row to a 1 Million row table isn't going to effect much. But adding 100,000 rows will. So where do you draw the line?
I really don't know. But 5%-10% is generally a good measure. Sometimes more sometimes less depending on the size. "Do not criticize someone until you walked a mile in their shoes, that way when you criticize them, you are a mile a way and have their shoes." Christopher R. Spence Oracle DBA Phone: (978) 322-5744 Fax: (707) 885-2275 Fuelspot 73 Princeton Street North, Chelmsford 01863 -----Original Message----- Sent: Tuesday, October 23, 2001 2:00 PM To: Multiple recipients of list ORACLE-L 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Christopher Spence 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).
