RE: SQL tuning help

[Sergei]

Title: RE: SQL tuning help

Let me clearfy. I am running Oracle 8.1.6 on solaris 8   Fastcash has 50M record tmp_brian_metareward1 has 600 records.   I was able to tune the query so it runs fast now. I created a combined index on subsite_id and attempt and I added a hint   UPDATE tmp_brian_metareward1 tmp    SET offers_seen  = (    SELECT /*+ INDEX(f IN_FASTCASH_SIDATMP) */ count(f.fastcash_id) FROM metareward.fastcash f                              WHERE f.subsite_id = tmp.subsite_id                                and attempt >= trunc(sysdate-1)                                and attempt < trunc(sysdate)                              group by tmp.subsite_id);   I am still having a problem with a similar query below: IN_FASTCASH_SIDFIDVER – index is for subsite_id fastcash_id and verified   UPDATE tmp_brian_metareward1 tmp    SET revenue = (SELECT /*+ INDEX(f IN_FASTCASH_SIDFIDVER) */ sum(f.mr_amount)/100 FROM metareward.fastcash f, metareward.transaction_fastcash tf                              WHERE f.subsite_id = tmp.subsite_id                                and f.fastcash_id = tf.fastcash_id                                and f.verified >= trunc(sysdate-1)                                and f.verified < trunc(sysdate)                              group by tmp.subsite_id);     transaction_fastcash table has 2.5M records fastcash table has                   50M record     Thank you Sergei     -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Whittle Jerome Contr NCI Sent: Tuesday, November 26, 2002 12:04 PM To: Multiple recipients of list ORACLE-L Subject: RE: SQL tuning help   Sergei, How many records in each table? What indexes are in these tables? What version of Oracle? What do you mean by 'began to hang'? I'd try making the attempts in the WHERE clause into a Between. I'd also try grouping by f.subsite_id. You could always throw a Rule hint at it and see what happens. Jerry Whittle ACIFICS DBA NCI Information Systems Inc. [EMAIL PROTECTED] 618-622-4145 -----Original Message----- From:   Sergei [SMTP:[EMAIL PROTECTED]] Hello everybody, I have the following query that runs every week.  UPDATE tmp_brian_metareward1 tmp   SET offers_seen  = (SELECT count(f.fastcash_id) FROM metareward.fastcash f                              WHERE f.subsite_id = tmp.subsite_id                                and attempt >= trunc(sysdate-1)                                and attempt < trunc(sysdate)                              group by tmp.subsite_id); This week it began to hang and I can't figure out why.  No changes were made to a database.  Please advise me on how I can tune it, which hints to add, or anything else I can do. Thank you Sergei