Re: Monitoring CBO degrading Switches in xplans?

On Thu, Jun 18, 2009 at 4:51 PM, Fmhabash <fmhabash_at_gmail.com> wrote:

> This is an issue that has made sleepless over and over again. Critical
> application sql changes its xplans causing elapse time to go unacceptably
> worst.
> We eventually wanted to monitor this kind of event proactively. To this
> effect, we query top n sql from awr order by elapsed time. We then compare
> most recent ET value to the previous n samples. We then calculate cost of
> current plan and compare it to existing awr ones cost.
> With all this info, we alert if ET and plan cost exceed thresholds.
>
> How do you cope with this issue and what have you done to monitor it (logic
> wise).
>
>
>
> ---------------
> Thank You.
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> http://www.freelists.org/webpage/oracle-l
>
>
>

-- 
Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

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