Re: The responsible

No I checked, the problem started when the table and index grow up to a limit size (some day in january).
before the table were too small and I had to set the parameters to get the optimizer use the index, now after 5 years had grown up to the point one or more execution paths changed and the configuration became self-defeating.

On 2/7/06, Grabowy, Chris <chris.grabowy_at_lmco.com> wrote:
>
> Just curious, was Oracle upgraded? Patched?
>
> ------------------------------
> *From:*oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]
> *On Behalf Of *Juan Carlos Reyes Pacheco
> *Sent:* Tuesday, February 07, 2006 12:21 PM
> *To:* Mike Killough
> *Cc:*oracle-l_at_freelists.org; jonathan_at_jlcomp.demon.co.uk
> *Subject:* Re: The responsible
>
> Hi Mike, the parameters was ok, and they solved the problem (5 years ago)
> But 5 years after (now), the situation reversed and I had to comment them
> out.
> To get the optimize choose the right way.
>
> On 2/7/06, Mike Killough <mwkillough_at_hotmail.com> wrote:
> >
> > This is why I always set the parameters generic in test and force them
> > to
> > reprove their need, before including them in the upgrade.
> >
> > Mike
> >
> >
> >
> > >From: Juan Carlos Reyes Pacheco < juancarlosreyesp_at_gmail.com>
> > >Reply-To: juancarlosreyesp_at_gmail.com
> > >To: oracle-l_at_freelists.org, jonathan_at_jlcomp.demon.co.uk
> > >Subject: The responsible
> > >Date: Tue, 7 Feb 2006 12:46:54 -0400
> > >
> > >HI I want to share this info, not asking.
> > >
> > >Some years ago I changed the optimizer parameters, and this solved a
> > query,
> > >from minutes to seconds
> > >OPTIMIZER_INDEX_COST_ADJ = 10
> > >OPTIMIZER_INDEX_CACHING = 90
> > >Now the situation reversed, and I had to comment them
> > >To move a process from 4 minutes to 7 seconds.
> > >
> > >using optimizer parameters 10,90
> > >trace file 870 M
> > >time 4 minutes (without trace)
> > >recursive 465.43 s
> > >non recursive 233.21 s
> > >
> > >
> > >commenting optimizer parameters and leaving with their defaults
> > >Trace file 6 M
> > >time 7 seconds
> > >recursive 5.87 s
> > >non recursive 1.79 s
> > >
> > >
> > >
> > >
> > >
> > >
> > >--
> > >Oracle Certified Profesional 9i 10g
> > >Orace Certified Professional Developer 6i
> > >
> > >8 years of experience in Oracle 7,8i,9i,10g and developer 6i
> >
> >
> >
>
>
> --
> Oracle Certified Profesional 9i 10g
> Orace Certified Professional Developer 6i
>
> 8 years of experience in Oracle 7,8i,9i,10g and developer 6i
>

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Oracle Certified Profesional 9i 10g
Orace Certified Professional Developer 6i

8 years of experience in Oracle 7,8i,9i,10g and developer 6i

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