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From: Greg Smith <greg@2ndquadrant.com>
To: Scott Carey <scott@richrelevance.com>
Cc: Marti Raudsepp <marti@juffo.org>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Defaulting wal_sync_method to fdatasync on Linux for 9.1?
Date: Wed, 17 Nov 2010 16:24:54 -0500
Message-ID: <4CE44826.2070508@2ndquadrant.com> (raw)
In-Reply-To: <499BFB3F-CD9F-47D2-87E4-058C2A6D63EC@richrelevance.com>
References: <AANLkTi=n3zxiLNFhbpiN=JPQPwB=BhXf9iepw1KOEs8U@mail.gmail.com>
	<4CCDCAA3.4050805@2ndquadrant.com>
	<201011010010.28724.andres@anarazel.de>
	<4CD472CC.80006@2ndquadrant.com>
	<AANLkTinEAmKDz7x356bgX=-6x7zpjK3bB0hYAmKvYHB9@mail.gmail.com>
	<4CE2EBF8.4040602@2ndquadrant.com>
	<499BFB3F-CD9F-47D2-87E4-058C2A6D63EC@richrelevance.com>

Scott Carey wrote:
> Did you recompile your test on the RHEL6 system? 

On both systems I showed, I checked out a fresh copy of the PostgreSQL 
9.1 HEAD from the git repo, and compiled that on the server, to make 
sure I was pulling in the appropriate kernel headers.  I wasn't aware of 
exactly how the kernel sync stuff was refactored though, thanks for the 
concise update on that.  I can do similar tests on a RHEL5 system, but 
not on the same hardware.  Can only make my laptop boot so many 
operating systems at a time usefully.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
PostgreSQL Training, Services and Support        www.2ndQuadrant.us
"PostgreSQL 9.0 High Performance": http://www.2ndQuadrant.com/books




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