Re: PLAN_HASH_VALUE in v$sql ?
- From: "Jonathan Lewis" <jonathan@xxxxxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 5 Mar 2004 07:41:09 -0000
select plan_hash_value, count(*)
from v$sql
group by plan_hash_value;
If you have a very large number of statements
with the same plan_hash_value, they may be
the "same" statement with different literal values -
i.e. candidates for bind variables.
Regards
Jonathan Lewis
http://www.jlcomp.demon.co.uk
The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
March 2004 Hotsos Symposium - The Burden of Proof
Dynamic Sampling - an investigation
March 2004 Charlotte OUG (www.cltoug.org) CBO Tutorial
April 2004 Iceland
June 2004 UK - Optimising Oracle Seminar
----- Original Message -----
From: "Dilip Chavan" <dilipc@xxxxxxxxxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
Sent: Friday, March 05, 2004 7:02 AM
Subject: PLAN_HASH_VALUE in v$sql ?
: Hi List,
:
: Just read from the documentation that PLAN_HASH_VALUE column (Hash value
: built on the execution plan) in the v$Sql is used to link V$SQL_PLAN view.
:
: But when I see in the database, normal HASH_VALUE column has been used to
: link these two views. Is there anything wrong here ?
:
: If HASH_VALUE column is used to link these views, then what is the use of
: PLAN_HASH_VALUE in v$sql ?
:
:
: Thanks,
: ~Dilip
:
:
:
:
: ----------------------------------------------------------------
: Please see the official ORACLE-L FAQ: http://www.orafaq.com
: ----------------------------------------------------------------
: To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx
: put 'unsubscribe' in the subject line.
: --
: Archives are at //www.freelists.org/archives/oracle-l/
: FAQ is at //www.freelists.org/help/fom-serve/cache/1.html
: -----------------------------------------------------------------
:
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx
put 'unsubscribe' in the subject line.
--
Archives are at //www.freelists.org/archives/oracle-l/
FAQ is at //www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------
Other related posts:
