Thanks for the tips. The hash join looks like the best bet. Someday we'll upgrade to 8.1.7. Someday...
Here is the plan and stats using /*+ USE_HASH(c p) */ Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=CHOOSE (Cost=104706 Card=601007 B ytes=100969176) 1 0 HASH JOIN (Cost=104706 Card=601007 Bytes=100969176) 2 1 TABLE ACCESS (FULL) OF 'CNR' (Cost=2203 Card=601007 Byte s=38464448) 3 1 TABLE ACCESS (FULL) OF 'PUB' (Cost=844 Card=531324 Bytes =55257696) Statistics ---------------------------------------------------------- 0 recursive calls 8 db block gets 58649 consistent gets 91957 physical reads 0 redo size 45285104 bytes sent via SQL*Net to client 441398 bytes received via SQL*Net from client 40070 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 601007 rows processed -----Original Message----- From: John Kanagaraj [SMTP:[EMAIL PROTECTED]] Sent: Friday, June 07, 2002 4:44 PM To: Multiple recipients of list ORACLE-L Subject: RE: Horrendous Execution Plan from CBO Mark, > Do any of you SQL tuning gurus have any suggestions? I've > listed all the > gory details below. I am not a SQL tuning guru, but it looks like this is an ideal example where Hash joins would be of immense help. You could set a largish value for HASH_AREA_SIZE (defaults to twice SORT_AREA_SIZE) to reduce visits to TEMP to write out hash tables... It would be nice if you could post the explain/costs for all three methods at the end of your tests. John Kanagaraj Oracle Applications DBA DBSoft Inc (W): 408-970-7002 The manuals for Oracle are here: http://tahiti.oracle.com The manual for Life is here: http://www.gospelcom.net ** The opinions and statements above are entirely my own and not those of my employer or clients ** -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: John Kanagaraj 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: Stahlke, Mark 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).