From: Gábriel Ákos <akos.gabriel@i-logic.hu>
To: pgsql-performance@postgresql.org
Subject: count(*) performance
Date: Mon, 27 Mar 2006 15:34:32 +0200
Message-ID: <4427E9E8.9030806@i-logic.hu> (raw)
Hi,
I guess this is an age-old 100times answered question, but I didn't find
the answer to it yet (neither in the FAQ nor in the mailing list archives).
Question: I have a table with 2.5M rows. count(*) on this table is
running 4 minutes long. (dual opteron, 4gig ram, db on 4 disk raid10
array (sata, not scsi)) Is this normal? How could I make it run faster?
Maybe make it run faster for the 2nd time? Which parameters should I
change in postgresql.conf and how?
--
Üdvözlettel,
Gábriel Ákos
-=E-Mail :akos.gabriel@i-logic.hu|Web: http://www.i-logic.hu=-
-=Tel/fax:+3612367353 |Mobil:+36209278894 =-
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: akos.gabriel@i-logic.hu
Subject: Re: count(*) performance
In-Reply-To: <4427E9E8.9030806@i-logic.hu>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox