Message-ID: 
 <17035565.1131571489652.JavaMail.root@elwamui-hound.atl.sa.earthlink.net>
Date: Wed, 9 Nov 2005 16:24:49 -0500 (EST)
From: Ron Peacetree <rjpeace@earthlink.net>
Reply-To: Ron Peacetree <rjpeace@earthlink.net>
To: Yves Vindevogel <yves.vindevogel@implements.be>,
	pgsql-performance@postgresql.org
Subject: Re: Some help on buffers and other performance tricks
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0=3D Optimize your schema to be a tight as possible.  Your goal is to give =
yourself the maximum chance that everything you want to work on is in RAM w=
hen you need it.
1=3D Upgrade your RAM to as much as you can possibly strain to afford.  4GB=
 at least.  It's that important.
2=3D If the _entire_ DB does not fit in RAM after upgrading your RAM, the n=
ext step is making sure your HD IO subsystem is adequate to your needs.
3=3D Read the various pg tuning docs that are available and Do The Right Th=
ing.
4=3D If performance is still not acceptable, then it's time to drill down i=
nto what specific actions/queries are problems.
If you get to here and the entire DBMS is still not close to acceptable, yo=
ur fundamental assumptions have to be re-examined.

Ron

-----Original Message-----
From: Yves Vindevogel <yves.vindevogel@implements.be>
Sent: Nov 9, 2005 3:11 PM
To: pgsql-performance@postgresql.org
Subject: [PERFORM] Some help on buffers and other performance tricks

Hi all,

I've got PG 8.0 on Debian sarge set up ...
I want to speed up performance on the system.

The system will run PG, Apache front-end on port 80 and Tomcat / Cocoon=20
for the webapp.
The webapp is not so heavily used, so we can give the max performance=20
to the database.
The database has a lot of work to do, we upload files every day.
The current server has 8 databases of around 1 million records.  This=20
will be more in the future.
There's only one main table, with some smaller tables.  95% of the=20
records are in that one table.
A lot of updates are done on that table, affecting 10-20% of the=20
records.

The system has 1 gig of ram.  I could give 512Mb to PG.
Filesystem is ext2, with the -noatime parameter in fstab

Could I get some suggestions in how to configure my buffers, wals, ....=20
?

Met vriendelijke groeten,
Bien =EF=BF=BD vous,
Kind regards,

Yves Vindevogel
Implements