Date: Wed, 22 Jan 2003 12:50:52 -0200 (GMT+2)
From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Michael Paesold <mpaesold@gmx.at>
Cc: pgsql-sql@postgresql.org, Michael Hostbaek <mich@the-lab.org>
Subject: Re: optimal sql
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Message-ID: <Pine.LNX.4.44.0301221230580.1263-100000@matrix.gatewaynet.com>
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On Wed, 22 Jan 2003, Michael Paesold wrote:

> Achilleus Mantzios <achill@matrix.gatewaynet.com> wrote:
>
> > For a) do all the necessary tuning on PostgreSQL.
> > With 1GB of Mem, you could set a value of shared_buffers to 100000.
>
> Perhaps just a type, but that is way to much! It would mean about 800 Mb
> shared buffers! I would rather suggest a value between 1000 and 10000. See
> recent descussions on -performance and -hackers mailing lists.

Personally i found only performance improvement when increasing
shared_buffers. (but then again i speak for me and my queries).
The 100,000 value was certainly not a typo (provided he doesnt run
X11,KDE, mozilla, etc... on his server) but maybe too high.
Some people say 25% of the total Mem is a good rule of thumb, but
testing for his specific query must be made.


>
> Best Regards,
> Michael Paesold
>
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==================================================================
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
Nikis 4, Glyfada
Athens 16610
Greece
tel:    +30-10-8981112
fax:    +30-10-8981877
email:  achill@matrix.gatewaynet.com
        mantzios@softlab.ece.ntua.gr