You full scans within the loops which are hitting the disks, ie.58730 which gives the big difference between cpu & elapsed as it's waiting for IO Also why do you need and p.business_country_id=c.countryabbrev
As well as and p.business_country_id in ( select countryabbrev from c ) Do you want to join to table c for any reason or do you just want to see if the country abbreviation is in table c? At the moment you are doing both. SO maybe fine tune the SQL to only do what you really need it to and your disk IO would go down along with your elapsed time. Hth Ian -----Original Message----- [EMAIL PROTECTED] Sent: Wednesday, 3 December 2003 9:49 To: Multiple recipients of list ORACLE-L Hi Gurus, Could someone shed some light on the following tkprof output. To get 0 record it is aking more than 11 seconds. Also I see huge difference between CPU time and elapsed time even though the system is not so busy(It is a test machine. very low load on it). If you say it is waiting on something, could you tell me how to identify the wait event associated with this and how to rectify the same? Also please let me know why the query count is very high? select countryname, e.lastupdatedate from e e, p p, c c where p.pid = e.pid and p.hsbc_user_category='GIB' and p.business_country_id=c.countryabbrev and e.userstatusid in ( select userstatusid from userstatus ) and p.business_country_id in ( select countryabbrev from c ) order by countryname, e.lastupdatedate desc call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 2 0.07 0.08 0 0 0 0 Execute 2 0.00 0.02 0 0 0 0 Fetch 2 42.95 133.21 58730 118694 24 0 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 6 43.02 133.31 58730 118694 24 0 Misses in library cache during parse: 1 Optimizer goal: CHOOSE Parsing user id: 165 Rows Row Source Operation ------- --------------------------------------------------- 0 SORT ORDER BY 0 NESTED LOOPS 1 NESTED LOOPS 1590 HASH JOIN 239 TABLE ACCESS FULL c 1589 HASH JOIN 239 VIEW VW_NSO_1 239 SORT UNIQUE 239 INDEX FAST FULL SCAN (object id 76648) 1589 TABLE ACCESS FULL p 1589 TABLE ACCESS BY INDEX ROWID e 1589 INDEX UNIQUE SCAN (object id 76709) 0 INDEX UNIQUE SCAN (object id 76899) ************************************************************************ ******** OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 4 0.07 0.08 0 0 0 0 Execute 5 0.00 0.05 0 0 0 2 Fetch 2 42.95 133.21 58730 118694 24 0 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 11 43.02 133.34 58730 118694 24 2 Misses in library cache during parse: 1 Thanks Jay -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: 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: Biddell, Ian 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).