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From: Joshua D. Drake <jd@commandprompt.com>
To: Greg Smith <gsmith@gregsmith.com>
Cc: Craig James <craig_james@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Benchmark: Dell/Perc 6, 8 disk RAID 10
Date: Thu, 13 Mar 2008 14:06:18 -0700
Message-ID: <20080313140618.3449ba58@commandprompt.com> (raw)
In-Reply-To: <Pine.GSO.4.64.0803131151430.24943@westnet.com>
References: <f966c2ee0803052142l6a105678jfe2da92a0d9371@mail.gmail.com>
	<f966c2ee0803052143k4570d771o6c300647d3b987d@mail.gmail.com>
	<20080306060829.GA21084@a-kretschmer.de>
	<bf54be870803052215y5bb56235k5ea05ada1d701022@mail.gmail.com>
	<47CF8EA6.8070503@mark.mielke.cc>
	<20080306063643.GB21084@a-kretschmer.de>
	<f966c2ee0803052243w723e2866gbfc37128620d1c6d@mail.gmail.com>
	<B94D3180-BB72-43EB-BA1E-90CF53705386@fastcrypt.com>
	<f966c2ee0803060358k14dd7374h8ef3f4ca0818b04@mail.gmail.com>
	<3E9C3A51-C28E-4B75-9739-E344DAC72880@fastcrypt.com>
	<f966c2ee0803060443j3d9c1b66x5f59e00d084e841c@mail.gmail.com>
	<Pine.GSO.4.64.0803060813570.11897@westnet.com>
	<47D00DB2.7040007@emolecules.com>
	<18451.1204824562@sss.pgh.pa.us>
	<47D0AFC1.5070305@emolecules.com>
	<47D8B3B6.3010606@emolecules.com>
	<20080312225554.52f6275b@commandprompt.com>
	<47D9402A.3050903@emolecules.com>
	<Pine.GSO.4.64.0803131151430.24943@westnet.com>

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On Thu, 13 Mar 2008 12:01:50 -0400 (EDT)
Greg Smith <gsmith@gregsmith.com> wrote:

> On Thu, 13 Mar 2008, Craig James wrote:
> 
> >> wal_sync_method = open_sync
> 
> There was a bug report I haven't had a chance to investigate yet that 
> suggested some recent Linux versions have issues when using
> open_sync. I'd suggest popping that back to the default for now
> unless you have time to really do a long certification process that
> your system runs reliably with it turned on.

Well the default would be ugly, that's fsync, fdatasync is probably a
better choice in that case.

Sincerely,

Joshua D. Drake


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