From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-performance@postgresql.org
Subject: Re: PostgreSQL performance issues
Date: Tue, 29 Aug 2006 16:46:36 +0200
Message-ID: <20060829144636.GA6796@localhost.localdomain> (raw)
In-Reply-To: <44F446B2.2090900@studentvillage.co.za>
References: <44F446B2.2090900@studentvillage.co.za>
am Tue, dem 29.08.2006, um 15:52:50 +0200 mailte Willo van der Merwe folgendes:
> and it has 743321 rows and a explain analyze select count(*) from
> property_values;
> QUERY
> PLAN
> ----------------------------------------------------------------------------------------------------------------------------------
> Aggregate (cost=55121.95..55121.96 rows=1 width=0) (actual time=
> 4557.797..4557.798 rows=1 loops=1)
> -> Seq Scan on property_values (cost=0.00..51848.56 rows=1309356 width=0)
> (actual time=0.026..2581.418 rows=1309498 loops=1)
> Total runtime: 4557.978 ms
> (3 rows)
>
> 4 1/2 seconds for a count(*) ? This seems a bit rough - is there anything else
Because of MVCC.
http://www.thescripts.com/forum/thread173678.htmlhttp://www.varlena.com/GeneralBits/120.phphttp://www.varlena.com/GeneralBits/49.php
Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47215, D1: 0160/7141639 (mehr: -> Header)
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To: pgsql-performance@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: PostgreSQL performance issues
In-Reply-To: <20060829144636.GA6796@localhost.localdomain>
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