Re: How number of columns affects performance

From: Francisco J Reyes <fran(at)natserv(dot)net>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net>, PostgreSQL performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: How number of columns affects performance
Date: 2003-08-01 20:56:08
Message-ID: 20030801163346.V49062@zoraida.natserv.net
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On Fri, 1 Aug 2003, Josh Berkus wrote:

> My attitude toward these normalization vs. performance issues is consistenly
> the same: First, verify that you have a problem. That is, build the
> database with everything in one table (or with child tables for Nullable
> fields, as above) and try to run your application. If performance is
> appalling, *then* take denormalization steps to improve it.

I think I understand your point, however it would be very laborious after
you do all development to find out you need to de-normalize.

On your experience at which point it would actually help to do this
de-normalization in PostgreSQL? I know there are numerous factors ,but any
feedback based on previous experiences would help.

Right now the work I am doing is only for company internal use. If I was
to ever do work that outside users would have access to then I would be
looking at 100+ concurrent users.

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