RE: Overhead using a role

From: Justin Cave (DDBC) <jcave_at_ddbcinc.com>
Date: Tue, 27 Apr 2004 12:42:16 -0600
Message-ID: <87E9F113CEF1D211A4C30090273018741BBD7B@ddbcinc.ddbc.local>

Can you trace the sessions involved and compare the parse and execute times? Any real role overhead would have to be on the parse side of things. If the parse component is the same for the two queries, there is probably something else going on, i.e. data is cached when the second query runs.

Justin Cave
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Larry Hahn Sent: Tuesday, April 27, 2004 11:32 AM
To: Oracle-L_at_freelists.org
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.=20

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

=09

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Received on Tue Apr 27 2004 - 16:05:23 CDT