RE: dbms_stats

Yes -- same platform and version. If you look on the list archives
(fatcity.com, for example) for a subject of "Burned by DBMS_STATS **AGAIN**"
back in April 2003, you may get some insight.

There are also known bugs in GATHER_SCHEMA_STATS in 8i. The recommendation is to iteratively call GATHER_TABLE_STATS.

GL!

Rich

Rich Jesse                           System/Database Administrator
rjesse_at_qtiworld.com                  Quad/Tech Inc, Sussex, WI USA

-----Original Message-----
Sent: Wednesday, December 03, 2003 3:04 PM To: Multiple recipients of list ORACLE-L

Hello,  

Oracle 8.1.7.4 on HP-UX 11i  

A week ago, we replaced 'analyze table ... estimate statistics sample 10 percent' with dbms_stats.gather_schema_stats('x', estimate_percent=>10, cascade=>true, degree=>4, method_opt=>''for all indexed columns size 2')  

Performace is good against partitioned tables but not for non-partitioned tables.  

Saw a note in Metalink that its better to do the above with 'cascade=>false' and then do a gather_index_stats separately.  

In my tests, I see that 'analyze' makes the CBO use an index while dbms_stats is making the CBO to use a FTS instead.  

Have you faced any similar issues?    

TIA
Prakash

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