Re: "snapshot too old" and undo_retention

Let me try that again.

You should probably use dbms_stats as you are on 9.2

It may also be unnecessary to compute histograms for all indexed columns, but hard to know what may break if you suddenly stop doing so. That requires testing.

eg.

begin
  dbms_stats.gather_table_stats('SAPR3',tabname=>'BSIS',estimate_percent=>1, block_sample=>true, cascade=>true);
end;

That will analyze the table and indexes by scanning 1 percent of blocks.

You will need to hit the books to see how to include histograms if needed. ( I can't recall)

On 9/29/05, Roger Xu <roger_xu_at_dp7uptx.com> wrote:
>
>
>
> "ANALYZE TABLE "SAPR3"."BSIS" COMPUTE STATISTICS FOR TABLE FOR ALL INDEXED
> COLUMNS SIZE 1 FOR ALL INDEXES"
>
> How do I break this into pieces?
>
> Thanks.
>
> -----Original Message-----
> From: Allen, Brandon [mailto:Brandon.Allen_at_OneNeck.com]
> Sent: Thursday, September 29, 2005 4:38 PM
> To: Roger Xu; Oracle-L_at_Freelists. Org (E-mail)
> Subject: RE: "snapshot too old" and undo_retention
>
>
> Are you computing stats (100% sample size)? Perhaps you could/should
> estimate a small portion, like 5% instead?
>
> -----Original Message-----
> From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org]On
> Behalf Of Roger Xu
>
>
>
> We have a huge table and it takes more than 24 hours to collect its
> statistics.
>
>
>
>
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--
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
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