Query Tuning Help

From: A Ebadi <ebadi01_at_yahoo.com>
Date: Wed, 31 Oct 2007 08:43:42 -0700 (PDT)
Message-ID: <425700.15710.qm@web51105.mail.re2.yahoo.com>

We've been trying to tune this query below, but to no avail. The table call_detail below is a very large hourly partitioned table with each partition being about 2-4GB! The other table (call_detail_cost_vero) is relatively small.    

  The two inner selects with minus runs fine alone in about 6-8 minutes, but the entire query doesn't finish even after running it for many hours! We've tried running it in parallel/no parallel and hasn't helped. Any recommendations would be appreciated. The explain plan is at the bottom of this e-mail also.    

  Thanks,
  Abdul    

  Environment: Sun Solaris, Oracle 10.2.0.3.0 on RAC (4 node)    

  SELECT /*+ parallel(a,10) */

         billing_act_nbr, final_tg_nbr, COUNT(*), SUM (call_duration_value),
         SUM (rated_cost_amt)
    FROM cdrw.call_detail a
             WHERE orig_dt >= TO_DATE ('20071016000000', 'yyyymmddhh24miss')
               AND orig_dt < TO_DATE ('20071016010000', 'yyyymmddhh24miss')
                        AND (record_typ='STOP' OR call_duration_value>0)
     AND guid IN (
            SELECT
                   guid
              FROM cdrw.call_detail c
             WHERE orig_dt >= TO_DATE ('20071016000000', 'yyyymmddhh24miss')
               AND orig_dt < TO_DATE ('20071016010000', 'yyyymmddhh24miss')
                        AND (record_typ='STOP' OR call_duration_value>0)
            MINUS
            SELECT
                   guid
              FROM cdrw.call_detail_cost_vero d
             WHERE orig_dt >= TO_DATE ('20071016000000', 'yyyymmddhh24miss')
               AND orig_dt < TO_DATE ('20071016010000', 'yyyymmddhh24miss'))

GROUP BY billing_act_nbr, final_tg_nbr;        

  EXPLAIN PLAN
  QUERY_PLAN

---

 SELECT STATEMENT Cost = 32
  2.1 HASH GROUP BY
    3.1 FILTER

      4.1 PX COORDINATOR
        5.1 PX SEND QC (RANDOM) ":TQ10000"
          6.1 PX BLOCK ITERATOR
            7.1 TABLE ACCESS FULL "CALL_DETAIL" TABLE
      4.2 MINUS
        5.1 SORT UNIQUE NOSORT
          6.1 PARTITION RANGE SINGLE
            7.1 TABLE ACCESS BY LOCAL INDEX ROWID "CALL_DETAIL" TABLE

  QUERY_PLAN

---

              8.1 INDEX RANGE SCAN "CALL_DETAIL_UK" INDEX (UNIQUE)
        5.2 SORT UNIQUE NOSORT
          6.1 PARTITION RANGE SINGLE
            7.1 INDEX RANGE SCAN "CALL_DETAIL_COST_VERO_PK" INDEX (UNIQUE)

   

 __________________________________________________

Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

--
http://www.freelists.org/webpage/oracle-l

Received on Wed Oct 31 2007 - 10:43:42 CDT