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Re: Stored Outlines in 10gR1

From: Daniel W. Fink <daniel.fink_at_optimaldba.com>
Date: Tue, 26 Dec 2006 13:29:35 -0700
Message-ID: <4591862F.20306@optimaldba.com>


At this point, it is one single statement for one specific business function that is the issue, so I would prefer to go with a stored outline so as to minimize the impact on any other processes.

Wolfgang Breitling wrote:
> At 10:46 AM 12/26/2006, A Joshi wrote:
>> Have you considered setting hidden parameter :
>>
>> _OPTIM_PEEK_USER_BINDS=FALSE
>> The default it true. for details metalink : *387394.1
>> *when googling also do metalinking,askoming.
>> Do you have gather statistics using histograms? You can think of
>> changing that since that will not involve much changes and will not
>> need bounce. Thanks
>
> I second the call to verify that the histogram is needed. Problems
> with plan differences due to BV peeking are usually due to
> inappropriate histograms. Changing _OPTIM_PEEK_USER_BINDS should be
> the last resort even *after *trying the stored_oulines. Unless there
> are very many stored outlines to create. Then setting
> _OPTIM_PEEK_USER_BINDS=false, perhaps by session in an after logon
> trigger, could be the lesser "evil" (not that stored outlines are evil).
>
>
> Regards
>
> Wolfgang Breitling
> Centrex Consulting Corporation
> www.centrexcc.com <http://www.centrexcc.com/>
>

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Received on Tue Dec 26 2006 - 14:29:35 CST

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