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Re: Same query doing slow then quick

From: FFW_Rude <FFW_Rude(at)hotmail(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Same query doing slow then quick
Date: 2012-09-26 14:41:34
Message-ID: SNT111-W245F4E05303F533C4356C2E19C0@phx.gbl (view raw or flat)
Thread:
Lists: pgsql-performance
Ok done to 512Mb and 2048Mb
I'm relaunching. See you in a few hours (so tommorrow)

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Date: Wed, 26 Sep 2012 07:17:56 -0700
From: ml-node+s1045698n5725506h46(at)n5(dot)nabble(dot)com
To: FFW_Rude(at)hotmail(dot)com
Subject: Re: Same query doing slow then quick



	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


>

>

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>

>



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Subject: Re: Same query doing slow then quick
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