I would highly recommend that you move to DBMS_STATS if you are running at least 8.1.6.3 -- especially if you are estimating statistics.
The reason is that DBMS_STATS generates more and better statistics than analyze. I've seen queries go from hours to minutes just by changing from ANALYZE to DBMS_STATS... There are a couple situations where you don't want to use DBMS_STATS -- when you are using partitioned function-based indexes. DBMS_STATS doesn't seem to do right. Just another issue with function-based indexes that is supposed to be fixed in 9.0.2. Caver -----Original Message----- Sent: Thursday, January 10, 2002 10:31 AM To: Multiple recipients of list ORACLE-L Now that I finally have all of our databases upgraded to 8.1.7 I am taking some time to look at our method of gathering statistics for CBO. It looks like I should move towards using DBMS_STATS to gather statistics, but I may want to use ANALYZE if I need to gather stats on individual columns (according to Note:166215.1). I was just curious to know if most DBAs are using DBMS_STATS instead of ANALYZE. For the most part, I had been using DBMS_UTILITY.ANALYZE_SCHEMA. I'll probably start using DBMS_STATS.GATHER_SCHEMA_STATS unless somebody convinces me otherwise. Any comments or things that I should watch out for? Thanks, Jay Hostetter Oracle DBA D. & E. Communications Ephrata, PA USA -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jay Hostetter 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: Toepke, Kevin M 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).
