Perf.Tuning

Question

Hi everybody,
Iam new to this oracle sql tuning.
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 2 0
Execute 46 0.42 4.61 717 47066 4332 6049
Fetch 0 0.00 0.00 0 0 0 0
total 47 0.42 4.61 717 47066 4334 6049
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer goal: FIRST_ROWS
How can i know where to tune my insert statement based on above part of trace file section?
Edited by: Mr. Murali on Jan 22, 2010 1:12 AM
Edited by: Mr. Murali on Jan 22, 2010 1:15 AM

Answer 1

Hi
please find the requested details.
INSERT INTO WRK(.....)
(SELECT ......
   FROM T_PT C,VL B, T_PRF A
  WHERE A.NF = :B4
    AND B.NVL = C.NVL
    AND ( (:B3 = 'Y') OR
        ( NVL(C.NCAT,-1) = (SELECT NVL(MAX(NCAT),-1)
                              FROM T_PT
                             WHERE NF = :B4
                               AND NVL = B.NVL
                               AND CRV IN ('B','F', 'E', 'V') AND QNT <> 0)))
    AND C.CRV IN ('B','F', 'E', 'V')
    AND A.NF = C.NF
    AND DECODE(:B2 ,'Y',C.QNTDE,'N',C.QNT)<> 0
  GROUP BY :B1 , A.NF , B.NVL , C.CRV )
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          2           0
Execute     46      0.42       4.61        717      47066       4332        6049
Fetch        0      0.00       0.00          0          0          0           0
total       47      0.42       4.61        717      47066       4334        6049
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer goal: FIRST_ROWS
unable to set optimizer goal
ORA-01986: OPTIMIZER_GOAL is obsolete
parse error offset: 33
Rows     Execution Plan
      0  INSERT STATEMENT   GOAL: FIRST_ROWS
      0   HASH (GROUP BY)
      0    FILTER
      0     NESTED LOOPS
      0      NESTED LOOPS
      0       NESTED LOOPS
      0        TABLE ACCESS   GOAL: ANALYZED (BY INDEX ROWID) OF
                   'PRF' (TABLE)
      0         INDEX   GOAL: ANALYZED (UNIQUE SCAN) OF 'I_PRFPR'
                    (INDEX (UNIQUE))
      0        INDEX   GOAL: ANALYZED (UNIQUE SCAN) OF 'I_DFPR'
                   (INDEX (UNIQUE))
      0       TABLE ACCESS   GOAL: ANALYZED (BY INDEX ROWID) OF 'PT'
                  (TABLE)
      0        INDEX   GOAL: ANALYZED (RANGE SCAN) OF 'I_PTPR'
                   (INDEX (UNIQUE))
      0      TABLE ACCESS   GOAL: ANALYZED (BY INDEX ROWID) OF
                 'VL' (TABLE)
      0       INDEX   GOAL: ANALYZED (UNIQUE SCAN) OF 'I_VLNVL'
                  (INDEX (UNIQUE))
      0     SORT (AGGREGATE)
      0      TABLE ACCESS   GOAL: ANALYZED (BY INDEX ROWID) OF 'PT'
                 (TABLE)
      0       INDEX   GOAL: ANALYZED (RANGE SCAN) OF 'I_PTPR'
                  (INDEX (UNIQUE))and can you please tell me how to understand or read the explain plan output also?
regards,
murali
Edited by: Mr. Murali on Jan 22, 2010 1:33 AM
Edited by: Mr. Murali on Jan 22, 2010 1:34 AM