Date: Mon, 28 Feb 2011 19:32:46 +0100
From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-performance@postgresql.org
Subject: Re: optimalization
Message-ID: <20110228183246.GA8491@tux>
References: <AANLkTi=4CfFBhwJM5iU4VbUFEHB3g5r5SRkL+GuS8Zc_@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <AANLkTi=4CfFBhwJM5iU4VbUFEHB3g5r5SRkL+GuS8Zc_@mail.gmail.com>
User-Agent: Mutt/1.5.18 (2008-05-17)

croolyc <croolists@gmail.com> wrote:

> Hi!
> can you help me with performance optimization
> on my machine I have 8 databases with ca. 1-2GB

Performace optimization depends on the workload...
Is that a dedicated server, only for PostgreSQL? I assume it.


> memory: 8GB (4*2GB ecc ram)

Okay, as a first try, set shared_buffers to 2 GByte, and increase
work_mem up to, maybe, 20 MByte.


You can (and should) set log_min_duration_statement, maybe to 1000
(1000ms), and observe the log. Read our docu about EXPLAIN, and analyse
long-running queries with EXPLAIN (ANALYSE).

And again, performance tuning depends on the real workload on the
server, it's hard to give you a recipe for all use-cases.


Andreas
-- 
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."   (unknown)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°