Re: Oracle managed statistics

On Oct 31, 12:00 pm, Altus <silverb..._at_photobooks.com> wrote:
> Once again I turn to the gurus.
>
> I have a vendor who is nervous about the Oracle managed statistics
> (target object auto). They don't like seeing objects with statistics
> older than a month.
>
> My choices are:
> 1) Fight a battle "re: are the statistics REALLY stale".
> This will be long and futile, since management likes vendors.
> 2) Change the frequency/agressiveness of the auto analyze.
> 3) Run the full analyze every day/week/2 weeks.
> Waste of resources / 8i way of doing things.
>
> Since I haven't played with the statistics area of GRID or 10g, I
> would like to take that approach.
>
> Is there a way to adjust Oracle's threshold?
>
> Thanks,
>
> Evan
>
> Oracle 10.2.0.3 on Red Hat 3.
> Three node RAC.
>
> GRID shows the script as:
> begin
> dbms_stats.gather_database_stats(
> options=> 'GATHER AUTO');
> end;
>
> Last night it analyzed 222 objects in 8.46 minutes. This left 899
> tables and 1553 indexes analyzed before September 22 (vendor has a
> tizzy).

I don't have much experience with this, but see http://www.freelists.org/archives/oracle-l/08-2005/msg00564.html

I think the vendor may have a point, in that gather auto may be incorrect in some fundamental assumptions, as I infer from Wolfgang's comments there. But I may be way off base, and I sure don't want to put words in anyones mouth. oracle-l has had many discussions about this, google oracle statistics gather auto site:freelists.org (although the past few days I've had to hit the browser back button to see the results???)

jg

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