From: Jon Schewe <jpschewe@mtu.net>
To: Bryan Hinton <bryan@bryanhinton.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: How filesystems matter with PostgreSQL
Date: Fri, 04 Jun 2010 13:23:06 -0500
Message-ID: <4C09448A.9040700@mtu.net> (raw)
In-Reply-To: <AANLkTikj7QNTV_6XlHPJnCYPAE5kh4ugxns14VoUxD0w@mail.gmail.com>
References: <4C08EEDF.7090403@mtu.net>
<201006041504.03218.andres@anarazel.de>
<2503.1275661530@sss.pgh.pa.us>
<201006041633.23343.andres@anarazel.de>
<AANLkTikj7QNTV_6XlHPJnCYPAE5kh4ugxns14VoUxD0w@mail.gmail.com>
I'm running on Linux, so that's not really an option here.
On 6/4/10 1:20 PM, Bryan Hinton wrote:
> UFS2 w/ soft updates on FreeBSD might be an interesting addition to
> the list of test cases
>
> On Fri, Jun 4, 2010 at 9:33 AM, Andres Freund <andres@anarazel.de
> <mailto:andres@anarazel.de>> wrote:
>
> On Friday 04 June 2010 16:25:30 Tom Lane wrote:
> > Andres Freund <andres@anarazel.de <mailto:andres@anarazel.de>>
> writes:
> > > On Friday 04 June 2010 14:17:35 Jon Schewe wrote:
> > >> XFS (logbufs=8): ~4 hours to finish
> > >> ext4: ~1 hour 50 minutes to finish
> > >> ext3: 15 minutes to finish
> > >> ext3 on LVM: 15 minutes to finish
> > >
> > > My guess is that some of the difference comes from barrier
> differences.
> > > ext4 uses barriers by default, ext3 does not.
> > Or, to put it more clearly: the reason ext3 is fast is that it's
> unsafe.
> Jon: To verify you can enable it via the barrier=1 option during
> mounting..
>
> Andres
>
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--
Jon Schewe | http://mtu.net/~jpschewe
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To: pgsql-performance@postgresql.org
Cc: jpschewe@mtu.net, bryan@bryanhinton.com, andres@anarazel.de, tgl@sss.pgh.pa.us
Subject: Re: How filesystems matter with PostgreSQL
In-Reply-To: <4C09448A.9040700@mtu.net>
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