RE: Overhead using a role
- From: "Powell, Mark D" <mark.powell@xxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 27 Apr 2004 14:31:03 -0400
There should be no difference in performance when running the query as the
owner and as any user with the necessary privileges on the query objects
from a role. Make sure that the different users are accessing the same
objects.
Joe: select * from table_a sees larry.table_a via private synonym
Bob: select * from table_a sees bob.table_a due to ownership
Session level setting of optimizer_mode or other parameters such as
sort_area_size could affect the plan and runtimes.
But why are you using the obsolete RBO?
-- Mark D Powell --
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Larry Hahn
Sent: Tuesday, April 27, 2004 1:32 PM
To: Oracle-L@xxxxxxxxxxxxx
Subject: Overhead using a role
Is there much overhead involved in using roles?
I have a query that runs about 4 minutes using the schema
owner account. The same query runs about 50% longer using a
userid that is attached to a role that has read any table
rights.
I did an Explain Plan on both, but they are exactly the
same. We are running under RBO. The database is 8.1.7.3
running on Sun Solaris.
Thanks for any light anyone can shed on this.
Larry
__________________________________
Do you Yahoo!?
Win a $20,000 Career Makeover at Yahoo! HotJobs
http://hotjobs.sweepstakes.yahoo.com/careermakeover
----------------------------------------------------------------
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:
