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

From Andreas Kostyrka
Subject Re: Performance of count(*)
Date
Msg-id 20070322151714.GA11448@andi-lap.la.revver.com
Whole thread Raw
In response to Re: Performance of count(*)  (Mario Weilguni <mweilguni@sime.com>)
Responses Re: Performance of count(*)
List pgsql-performance
* Mario Weilguni <mweilguni@sime.com> [070322 15:59]:
> 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...
Well, mysql claims InnoDB to be mvcc ;)

Andreas

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