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Re: Slow SELECT on three or more clients

From: Andreas Kostyrka <andreas(at)kostyrka(dot)org>
To: "AMIR FRANCO D(dot) JOVEN" <amir(at)digi(dot)ph>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Slow SELECT on three or more clients
Date: 2006-11-15 13:29:09
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Lists: pgsql-performance
* AMIR FRANCO D. JOVEN <amir(at)digi(dot)ph> [061115 12:44]:
> Hi!
> Im new to PostgreSQL.
> My current project uses PostgreSQL 7.3.4.
Ancient. Upgrade it, especially if it's a new database.

> the problem is like this:
> I have a table with 94 fields and a select with only one resultset in only
> one client consumes about 0.86 seconds.
> The client executes three 'select' statements to perform the task which
> consumes 2.58 seconds.
> With only one client this is acceptable, but the real problem is as i add
> more clients, it goes more and more slower.
That depends upon:
a) your table schema.
b) the data in the tables. E.g. how big are rows, how many rows.
c) the size of the result sets.
d) your indexes?


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