Re: Dynamic sampling
- From: Hemant K Chitale <hemantkchitale@xxxxxxxxx>
- To: william@xxxxxxxxxxxxxxxxxxxx
- Date: Thu, 11 Nov 2010 18:12:07 +0800
I don't have access to run the query. It is called from a procedure in a
package executed by the application. I can only "see" it.
Hemant K Chitale
http://hemantoracledba.blogspot.com
sent from my smartphone
On Nov 11, 2010 4:39 PM, "William Robertson" <william@xxxxxxxxxxxxxxxxxxxx>
wrote:
Ah, agreed that would be a helpful feature. It would also be good if the
plan could indicate whether global or partition stats (or default estimates)
were used and whether they are stale.
I wouldn't be without dynamic sampling though. I find one instant-tuning
technique is to try the query at level 9 (either via hint or alter session)
and see if it produces a better plan, preferably using 'ADVANCED' in the
call to dbms_xplan.display_cursor to get the outline section. Then if it
does, figure out what's better about it. It's a bit like using DBMS_SQLTUNE
but without the requirement for special privileges.
William Robertson
-------- Original Message --------
Subject: Re: Dynamic sampling
From: Hemant K Chitale <hemantkch...
CC: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
Date: 11/11/2010 08:20
>
> The number of lines (operations) in...
-- //www.freelists.org/webpage/oracle-l
Other related posts:
