SQL profile - need help please

Question

Hi folks
Enterprise Manager suggested a better plan for me (Oracle 10.2.3 /
Solaris64) and I went for it. However, it doesn't look like it's being
used at all. EM still shows the SQL using the inefficient plan.
So I reckoned the force_match was the issue (even tho the SQL uses all bind variables - that might not be right though?)
SQL> l
1 begin
2 dbms_output.put_line(
3 dbms_sqltune.accept_sql_profile(
4 task_name => 'SQL_TUNING_1271147514497',
5 name => 'SYS_SQLPROF_0149fdae48460004',
6 replace => true,
7 force_match => true)
8 );
9* end;
SQL> /
SYS_SQLPROF_0149fdae48460004
PL/SQL procedure successfully completed.
SQL> select force_matching from dba_sql_profiles where name =
'SYS_SQLPROF_0149fdae48460004';
FOR
NO
Can anyone advise why this might be please ? The Tuning ID in EM is
correct (that's where I got it from).
Basically, I have
Operation Object Object Type Order Rows Size (KB) Cost Time (sec) CPU
Cost I/O Cost
SELECT STATEMENT
11
743
NESTED LOOPS
10 4 0.496 743 9 39626522 733
NESTED LOOPS
7 4 0.453 735 9 39563064 725
VIEW
4 4 0.254 730 9 39499102 720
HASH UNIQUE
3 4 0.156 730 9 39499102 720
FILTER
2
INDEX RANGE SCAN
HCREF.S436_IX1 INDEX (UNIQUE) 1 4 0.156 729 9 35552327 720
TABLE ACCESS BY INDEX ROWID
HCREF.F436 TABLE 6 1 0.050 2 1 16553 2
INDEX UNIQUE SCAN
HCREF.F436_UK1 INDEX (UNIQUE) 5 1
1 1 9021 1
TABLE ACCESS BY INDEX ROWID
HCREF.MMLINE TABLE 9 1 0.011 2 1 16673 2
INDEX UNIQUE SCAN
HCREF.A436_IX1 INDEX (UNIQUE) 8 1
1 1 9021 1
MMLINE should be above F436 in the plan for optimum performance. All
stats are up to date, and the TEST system does it the right way. I
can't find anything to account for the different plan (sga, pga, IO,
parameters, anything!).
Any help as to how I can force LIVE to do what TEST is doing? If the
force-match takes effect, I'd like to assume that would have sorted
it ? We have no access to the underlying SQL.
SELECT /*+ LEADING INDEX(S_ S436_IX1) INDEX(SHAPE F436_UK1)
INDEX(MMLINE A436_IX1) */ HCREF.MMLINE.FEATCODE,
HCREF.MMLINE.SHAPE ,S_.eminx,S_.eminy,S_.emaxx,S_.emaxy ,SHAPE.fid,SHAPE.numofpts,SHAPE.entity,SHAPE.points,SHAPE.rowid
FROM (SELECT /*+ INDEX(SP_ S436_IX1) */ DISTINCT sp_fid, eminx, eminy,
emaxx, emaxy FROM HCREF.S436 SP_ WHERE SP_.gx >= :1 AND SP_.gx <= :2
AND SP_.gy >= :3 AND SP_.gy <= :4 AND SP_.eminx <= :5 AND SP_.eminy
<= :6 AND SP_.emaxx >= :7 AND SP_.emaxy >= :8) S_ , HCREF.MMLINE ,
HCREF.F436 SHAPE WHERE S_.sp_fid = SHAPE.fid AND S_.sp_fid =
HCREF.MMLINE.SHAPE
Thanks
A

Answer 1

Anyone got any suggestions ? Much appreciated, thanks.
A