Re: freebsd/softupdates for data dir

From: Vivek Khera <vivek(at)khera(dot)org>
To: Postgresql Performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: freebsd/softupdates for data dir
Date: 2006-04-04 14:41:32
Message-ID: C5DD26F3-47FD-41B8-A56A-F617B780FA1F@khera.org
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On Apr 3, 2006, at 10:10 PM, Mark Kirkwood wrote:

> I've always left them on, and never had any issues...(even after
> unscheduled power loss - which happened here yesterday). As I
> understand it, the softupdate code reorders *metadata* operations,
> and does not alter data operations - so the effect of fysnc(2) on a
> preexisting file is not changed by softupdates being on or off.

This is also my understanding, and I also leave softupdates on for
the data partition. Even if it doesn't improve performance, it will
not reduce it, and otherwise does no harm with respect to postgres'
disk usage.

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