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Re: High load,

From: Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-performance(at)postgresql(dot)org, Michael Kohl <michael(dot)kohl(at)tupalo(dot)com>
Subject: Re: High load,
Date: 2011-01-27 13:23:48
Message-ID: AANLkTi=ZoDQzy=M4JHfsPsU7sDYKHcVb8rvUTh3LiQXE@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
2011/1/27 Andres Freund <andres(at)anarazel(dot)de>:
> On Thursday, January 27, 2011 12:24:10 PM Cédric Villemain wrote:
>> > maintenance_work_mem = 512MB
>> 128MB is usualy enough
> Uhm, I don't want to be picky, but thats not really my experience. Sorts for
> index creation are highly dependent on a high m_w_m. Quite regularly I find the
> existing 1GB limit a probleme here...

That is right for index creation, but not for 'pure' maintenance
stuff. Once the database is running as usual, there is no really point
to give auto-vacuum or auto-analyze much more (depend on the raid card
memory too ...)

-- 
Cédric Villemain               2ndQuadrant
http://2ndQuadrant.fr/     PostgreSQL : Expertise, Formation et Support

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