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From: Tom Lane <tgl@sss.pgh.pa.us>
To: André Volpato <andre.volpato@ecomtecnologia.com.br>
Cc: pgsql-performance@postgresql.org
Subject: Re: Postgres not using array
Date: Thu, 21 Aug 2008 15:10:18 -0400
Message-ID: <29595.1219345818@sss.pgh.pa.us> (raw)
In-Reply-To: <48AD80FA.30100@ecomtecnologia.com.br>
References: <48AC8292.5000708@ecomtecnologia.com.br>
	<48AD735D.6040403@ecomtecnologia.com.br>
	<23465.1219328880@sss.pgh.pa.us>
	<48AD80FA.30100@ecomtecnologia.com.br>

=?ISO-8859-1?Q?Andr=E9_Volpato?= <andre.volpato@ecomtecnologia.com.br> writes:
> Tom Lane escreveu:
>> So I guess the question is "what is the bds_internacoes function, and
>> why is it so slow?"	

> This function is quite fast:

Well, "fast" is relative.  It's not fast enough, or you wouldn't have
been complaining.

> We are guessing that a dual core 3.0GHz will beat up a quad core 2.2,
> at least in this environmnent with less than 4 concurrent queryes.

The most you could hope for from that is less than a 50% speedup.  I'd
suggest investing some tuning effort first.  Some rethinking of your
schema, for example, might buy you orders of magnitude ... with no new
hardware investment.

			regards, tom lane

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