Re: effective_cache_size on 32-bits postgres

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: effective_cache_size on 32-bits postgres
Date: 2013-03-18 18:33:49
Message-ID: CAFj8pRCT6W4Hi0cKAySkzdC90Dho2jUMtgwGg0X575XXQWkKAA@mail.gmail.com
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2013/3/18 Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com>:
> So setting this as half of ram, as suggested in postgres tuning webpage
> should be safe?
> It says it is a conservative value...

depends how much memory is used as cache ??

it can be a shared_buffers + file system cache

Regards

Pavel Stehule

>
>
> On Mon, Mar 18, 2013 at 3:18 PM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
> wrote:
>>
>> 2013/3/18 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
>> > Hello
>> >
>> > 2013/3/18 Rodrigo Barboza <rodrigombufrj(at)gmail(dot)com>:
>> >> Hi guys, I am worried about the effective_cache_size.
>> >> I run a 32-bits postgres installation on a machine with 64 bits kernel.
>> >> Should I limit effective_cache_size to a maximum of 2.5gb?
>> >
>> > sure and probably little bit less
>>
>> wrong reply - Rob has true
>>
>> Pavel
>>
>> >
>> > Regards
>> >
>> > Pavel
>
>

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