Re: Count not updated with VACUUM ANALYZE

> Melvin Davidson a écrit :
> > *PgAdmin III 1.8.2***
> >
> >
> >
> > I have statistics enabled on my server. However, when I do a VACUUM
> > ANALYZE on my database, the count [ Rows (counted) ] is set to “not
> > counted”.
> >
> >
> >
> > Now I can right click on the individual tables and select
> “Count” to
> > manually update it, but shouldn’t the VACUUM have done that?
> >
>
> Nope. ANALYZE collects some statistics (for example an
> estimated number
> of rows on each table... this number is available in pgAdmin
> under the
> exact number of rows).

I think Guillaume meant "estimated" rather than "exact" here.

> The Count item of the contextual menu does a count(*) on the
> table. So,
> it gives you the exact number of rows.
>
> > Also, is there an documented (or undocumented) function I
> can run to
> > manually update the counts.
> >
>
> No. You really need to select the menu item "Count" to have the exact
> number of rows.

There is an option under the Query tab named
"Count rows if estimated less than"
which you could change to a larger number.

I have mine set to 0 as I don't like the delay, and the estimates fill my needs.

Regards,
Stephen Denne.

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