RE: Bind variable peeking and Dynamic sampling

From: Kerber, Andrew W. <Andrew.Kerber_at_umb.com>
Date: Tue, 8 May 2007 07:36:13 -0500
Message-ID: <D40740337A3B524FA81DB598D2D7EBB307EF00B2@x6009a.umb.corp.umb.com>

If the issue is changing plans, and you think you want to keep the same plan, I would say you want to use profiles to store the optimal plans, not dynamic sampling.

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of fairlie rego Sent: Tuesday, May 08, 2007 3:43 AM
To: Oracle-L
Subject: Bind variable peeking and Dynamic sampling

Hi,

I am at a site which is a high intensive OLTP site doing more than 400 txns/sec on a 8 node cluster on 10.1.0.5 RAC. We are thinking of switching off bind variable peeking and looking into an optimal value of dynamic sampling since we have plans flipping all the time and causing havoc.

I would like to know if there are any other customers who have disabled bind variable peeking and what value of dynamic sampling is being used by them

Thanks

Fairlie

Fairlie Rego
Senior Oracle Consultant

http://el-caro.blogspot.com/

M: +61 402 792 405

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Received on Tue May 08 2007 - 07:36:13 CDT