I wrote an LIO monitor, that should help to show what kind of LIO you are doing. It could help explain the difference in time. Give it a try and let me know what you see. Download it from oraperf.com
Anjo. ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Friday, April 04, 2003 10:49 PM > List - As I mentioned earlier, a new manager came from a site that regularly > rebuilt tables. I protested the value of this, but his response was "well, > at least you could test it." So on a test instance I've been doing a CTAS to > create a reorganized copy of the table in the same tablespace (LMT with > uniform extents, autoextend on). As expected, the number of blocks is very > close. > Then I've been doing a FTS (select count(*)) on both tables. Usually the > time is very close. However, on one large table, the original is much faster > -- 18-sec. vs. 27-sec. 21,349 blocks vs. 21179. Same plan. Does anyone have > a theory for this discrepancy? > > Dennis Williams > DBA, 40%OCP, 100% DBA > Lifetouch, Inc. > [EMAIL PROTECTED] > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: DENNIS WILLIAMS > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > 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.net -- Author: Anjo Kolk INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- 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).
