Message-ID: <506057E7.5090008@ulb.ac.be>
Date: Mon, 24 Sep 2012 14:53:59 +0200
From: Julien Cigar <jcigar@ulb.ac.be>
Organization: Belgian Biodiversity Platform
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To: Andres Freund <andres@2ndquadrant.com>
CC: pgsql-performance@postgresql.org
Subject: Re: Postgres becoming slow, only full vacuum fixes it
References: <D15ECA12-8D6E-4E53-A294-5E175564CA61@gmail.com>
	<71DC95CE-16EF-4D53-9971-C573DCD30622@gmail.com>
	<50605035.8020107@ulb.ac.be>
	<201209241434.56760.andres@2ndquadrant.com>
In-Reply-To: <201209241434.56760.andres@2ndquadrant.com>
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On 09/24/2012 14:34, Andres Freund wrote:
> On Monday, September 24, 2012 02:21:09 PM Julien Cigar wrote:
>> 5) synchronous_commit = off should only be used if you have a
>> battery-backed write cache.
> Huh? Are you possibly confusing this with full_page_writes?

indeed...! sorry for that
(note that you still have a (very) small chance of loosing data with 
synchronous_commit = off if your server crashes between two "commit chunks")

> Greetings,
>
> Andres


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