Re: Performance of count(*) - Mailing list pgsql-performance

From Mario Weilguni
Subject Re: Performance of count(*)
Date
Msg-id 200703221536.32575.mweilguni@sime.com
Whole thread Raw
In response to Re: Performance of count(*)  ("Jonah H. Harris" <jonah.harris@gmail.com>)
Responses Re: Performance of count(*)  (Andreas Kostyrka <andreas@kostyrka.org>)
List pgsql-performance
Am Donnerstag, 22. März 2007 15:33 schrieb Jonah H. Harris:
> On 3/22/07, Merlin Moncure <mmoncure@gmail.com> wrote:
> > As others suggest select count(*) from table is very special case
> > which non-mvcc databases can optimize for.
>
> Well, other MVCC database still do it faster than we do.  However, I
> think we'll be able to use the dead space map for speeding this up a
> bit wouldn't we?

Which MVCC DB do you mean? Just curious...

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