RE: CBO question ?
- From: "Ric Van Dyke" <ric.van.dyke@xxxxxxxxxx>
- To: <Venu.Andem@xxxxxxxxxxxxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 2 Mar 2006 10:43:42 -0600
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96533/opti
mops.htm#PFGRF001
This is a good place to start. Tahiti appears to be up now.
Ric Van Dyke
Hotsos Enterprises
-----------------------
Hotsos Symposium, be there:
http://www.hotsos.com/portal/events/SYM06
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Andem, Venu
Sent: Thursday, March 02, 2006 11:37 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: CBO question ?
You will have to look into DBA_TABLES (LAST_ANALYZED column), i would
want to point you to the exact location where you can read some info
inside http://tahiti.oracle.com but somehow strangely the site is down.
If the site comes up, make sure you check the performance tuning guide,
a chapter on CBO, can't remember the exact name (might be just CBO).
-Venu
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Savio Pinto (s)
Sent: 02 March 2006 16:32
To: paul.baumgartel@xxxxxxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: RE: CBO question ?
Thanks, but how can i check/verify that the statistics are
stored for a particular table in the data dictionary ?
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Baumgartel, Paul
Sent: Thursday, March 02, 2006 9:31 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: CBO question ?
If any table mentioned in the query has statistics
stored in the data dictionary, Oracle will use the CBO.
Paul Baumgartel
paul.baumgartel@xxxxxxxxxxxxxxxxx
212.538.1143
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Savio Pinto (s)
Sent: Thursday, March 02, 2006 10:28 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: CBO question ?
Hi,
The execution plan for a query in oracle 9i
shows "Optimizer= CHOOSE", how can i force the DB engine to use the COST
based optimization for a query ?
Oracle version is 9.2.0.4.0
Thanks
Savio Pinto
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