From: Julien Cigar <jcigar@ulb.ac.be>
To: pgsql-performance@postgresql.org
Subject: Re: Same query doing slow then quick
Date: Wed, 26 Sep 2012 16:17:19 +0200
Message-ID: <50630E6F.5040605@ulb.ac.be> (raw)
In-Reply-To: <1348668859243-5725505.post@n5.nabble.com>
References: <1348662446741-5725486.post@n5.nabble.com>
<1348664629662-5725491.post@n5.nabble.com>
<50630162.2090603@ulb.ac.be>
<SNT111-W18646B5C50D8B2D96AE68DE19C0@phx.gbl>
<506307E2.4060504@ulb.ac.be>
<1348668859243-5725505.post@n5.nabble.com>
On 09/26/2012 16:14, FFW_Rude wrote:
> Thank for you answer.
>
> shared_buffer is at 24Mb
> effective_cache_size at 2048Mb
>
> What do you mean properly ? That's not really helping a novice...
>
from my previous mail:
before looking further, please configure shared_buffers and
effective_cache_size properly, it's fundamental
you'll probably need to raise SHMALL/SHMMAX, take a look at:
http://www.postgresql.org/docs/current/static/kernel-resources.html
for 4GB of RAM I would start with shared_buffers to 512MB and
effective_cache_size to 2GB
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/Same-query-doing-slow-then-quick-tp5725486p5725505.html
> Sent from the PostgreSQL - performance mailing list archive at Nabble.com.
>
>
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Subject: Re: Same query doing slow then quick
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