From: Andreas Kostyrka <andreas@kostyrka.org>
To: Mario Weilguni <mweilguni@sime.com>
Cc: pgsql-performance@postgresql.org, "Jonah H. Harris" <jonah.harris@gmail.com>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: Andreas Tille <tillea@rki.de>
Subject: Re: Performance of count(*)
Date: Thu, 22 Mar 2007 16:17:17 +0100
Message-ID: <20070322151714.GA11448@andi-lap.la.revver.com> (raw)
In-Reply-To: <200703221536.32575.mweilguni@sime.com>
References: <Pine.LNX.4.62.0703221149210.13747@wr-linux02>
<b42b73150703220639x40dbac7en29318778b43e1e4c@mail.gmail.com>
<36e682920703220733s322788f7i5f89339466c7938c@mail.gmail.com>
<200703221536.32575.mweilguni@sime.com>
* 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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To: pgsql-performance@postgresql.org
Cc: andreas@kostyrka.org, mweilguni@sime.com, jonah.harris@gmail.com, mmoncure@gmail.com, tillea@rki.de
Subject: Re: Performance of count(*)
In-Reply-To: <20070322151714.GA11448@andi-lap.la.revver.com>
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