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RE: Sql Tuning Thoughts?

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Thu, 22 Jan 2004 09:54:25 -0800
Message-ID: <F001.005DDE78.20040122095425@fatcity.com>








it depends on how the code is written ... maybe it is doing row operations ... care to show the code (at-least pseudo code) ??
 
Raj
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-----Original Message-----
From: Tracy Rahmlow [mailto:tracy.rahmlow@aexp.com]
Sent: Thursday, January 22, 2004 12:24 PM
To: Multiple recipients of list ORACLE-L
Subject: Sql Tuning Thoughts?


This statement is from a batch program within a pl/sql procedure. (Also, I have many similar ones within the process)  The policy table has approximately 6.2 million rows.  The procedure is to incrementally(daily) build an extract table from multiple tables.  The extract table is then used for reporting purposes. The statement performs well per policy, however it is being executed 43,000+ times.  Is there a design option available to me to reduce the number of executions and be more scaleable?    I am considering the creation of an index to incorporate both the policy_number and the pol_eff_date hopefully eliminating the table access.  

We are currently on 8.1.7.


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


SELECT MIN(P.POL_EFF_DATE)  
FROM
 PHXADM.POLICY P  WHERE P.POLICY_NUMBER = :b1


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        1      0.00       0.01          0          0          0           0
Execute  43814      1.95       1.57          0          0          0           0
Fetch    43814     55.88     599.11     408248     568098          0       43814
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total    87629     57.83     600.69     408248     568098          0       43814

Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 547  (RPTADM)   (recursive depth: 1)

Rows     Execution Plan
-------  ---------------------------------------------------
      0  SELECT STATEMENT   GOAL: CHOOSE
      0   SORT (AGGREGATE)
      0    TABLE ACCESS   GOAL: ANALYZED (BY INDEX ROWID) OF 'POLICY'
      0     INDEX   GOAL: ANALYZED (RANGE SCAN) OF 'POLICY_PK' (UNIQUE)

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Author: Jamadagni, Rajendra
  INET: Rajendra.Jamadagni_at_espn.com

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Received on Thu Jan 22 2004 - 11:54:25 CST

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