Oracle-L: RE: Execution Plan is good but HIGH CPU

From: Muqthar Ahmed <Muqthar.Ahmed_at_decoratetoday.com>
Date: Tue, 28 Oct 2003 09:44:31 -0800
Message-ID: <F001.005D4D24.20031028094431@fatcity.com>

Hi,

The developer was executing the SQL statement in the loop in procedure. After re-writing the code, now the performance is good.

Thanks
Muqthar Ahmed

-----Original Message-----
Sent: Tuesday, October 28, 2003 8:09 AM
To: Multiple recipients of list ORACLE-L

It's 800 sec for 5617 exec/fetch calls. It looks like it's a sql inside a cursor loop or stored proc that gets called from some app. If you are unhappy, try to get rid of the cursor logic and get everything done in one sql call.

Waleed

-----Original Message-----
Sent: Tuesday, October 28, 2003 12:24 AM To: Multiple recipients of list ORACLE-L

Hi,

Execution plan looks good but the query is consuming 800 seconds CPU time........why?

SELECT sampleavail, sample_cost_amount, sample_sale_amount, discount_room, discount_case, discount_half_case, allow_cut, retail_cut_amount, cost_cut_amount, gp_room from tbljnwpbookvendortype t1, tbljnwpbookvendor t2 where t1.jnwpbvid = t2.jnwpbvid

  and t2.prsuid = :b3
  and t2.wpbkid = :b2
  and t1.wpptid = :b1

call     count       cpu    elapsed       disk      query    current

rows
------- ------ -------- ---------- ---------- ---------- ----------

Parse 1 0.00 0.00 0 0 0 0
Execute 5618 0.63 0.58 0 0 0 0
Fetch 5617 800.05 782.07 0 1409683 0 4187
------- ------ -------- ---------- ---------- ---------- ----------

total 11236 800.68 782.66 0 1409683 0 4187

Misses in library cache during parse: 0
Optimizer goal: CHOOSE
Parsing user id: 109 (DDTBL) (recursive depth: 1)

Rows Execution Plan

-------  ---------------------------------------------------
      0  SELECT STATEMENT   GOAL: CHOOSE
      0   NESTED LOOPS
      0    TABLE ACCESS (BY INDEX ROWID) OF 'TBLJNWPBOOKVENDOR'
      0     INDEX (UNIQUE SCAN) OF 'TBLJNWPBOOKVENDOR_UQ1' (UNIQUE)
      0    TABLE ACCESS (BY INDEX ROWID) OF 'TBLJNWPBOOKVENDORTYPE'
      0     INDEX (RANGE SCAN) OF 'TBLJNWPBOOKVENDORTYPE_IDX1' 
                (NON-UNIQUE)

****************************************************************************

Muqthar Ahmed

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Author: Muqthar Ahmed
INET: Muqthar.Ahmed_at_decoratetoday.com

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Author: Khedr, Waleed
INET: Waleed.Khedr_at_FMR.COM

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