Re: dbms_utility.analyze_schema OR dbms

From: Connor McDonald <hamcdc_at_yahoo.co.uk>
Date: Wed, 06 Jun 2001 09:23:50 -0700
Message-ID: <F001.0031E58C.20010606083600@fatcity.com>

As far as I can work out, DBMS_STATS is purely for optimizer decisions (presumably thats why they didn't call it DBMS_ANALYZE).

(If you believe the doco) you can get faster and better stats with DBMS_STATS (particularly in terms of partition-wise stats).

I'm using both at the moment, in my case, a weekly dbms_stats to help the optimiser, and a monthly analyze to help me (chain rows etc etc).

hth
connor

Gene Sais <Gsais_at_co.palm-beach.fl.us> wrote: > Oracle 8.1.7
> AIX 4.3.3
>
> I looked at the docs and it appears Oracle wants you
> to use dbms_stats to generate statistics for cbo. I
> am currently using dbms_utility.analyze_schema.
>
> Should I change to dbms_stats (i know it doesnt give
> you chained rows, avg free space, # of unused
> blocks)? Are there any advantages over
> dbms_utility.analyze_schema?
>
> What does everyone here use to generate their stats?
>
> Thanks.
> Gene
>
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Received on Wed Jun 06 2001 - 11:23:50 CDT

Re: dbms_utility.analyze_schema OR dbms_stats ?