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Re: wal_sync_methods for AIX

From: Dan Langille <dan(at)langille(dot)org>
To: Erik Jones <erik(at)myemma(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: wal_sync_methods for AIX
Date: 2008-02-19 21:58:19
Message-ID: 47BB50FB.4060608@langille.org (view raw or flat)
Thread:
Lists: pgsql-performance
Erik Jones wrote:
> 
> On Feb 15, 2008, at 3:55 PM, Dan Langille wrote:
> 
>> We're using PostgreSQL 8.1.11 on AIX 5.3 and we've been doing some 
>> playing around
>> with various settings.  So far, we've (I say we, but it's another guy 
>> doing the work) found
>> that open_datasync seems better than fsync.  By how much, we have not 
>> yet determined,
>> but initial observations are promising.
> 
> Here's a good explanation (by the Greg Smith) on the different sync 
> methods.  It basically says that if you have open_datasync available, 
> it'll probably beat everything else.

Where is that explanation?

-- 
Dan Langille

BSDCan - The Technical BSD Conference : http://www.bsdcan.org/
PGCon  - The PostgreSQL Conference:     http://www.pgcon.org/

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