From: Robert Lor <Robert.Lor@Sun.COM>
To: Chris Mair <list@1006.org>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: Mark Kirkwood <markir@paradise.net.nz>
Cc: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com
Subject: Re: bad performance on Solaris 10
Date: Thu, 06 Apr 2006 00:36:37 -0700
Message-ID: <4434C505.1000205@sun.com> (raw)
In-Reply-To: <1144303269.3718.4.camel@dell.home.lan>
References: <1144111178.3723.80.camel@dell.home.lan>
<1144279780.5133.19.camel@dell.home.lan>
<44346DAA.2080905@paradise.net.nz>
<200604052135.14326.josh@agliodbs.com>
<1144303269.3718.4.camel@dell.home.lan>
Chris Mair wrote:
>Ok, so I did a few runs for each of the sync methods, keeping all the
>rest constant and got this:
>
>open_datasync 0.7
>fdatasync 4.6
>fsync 4.5
>fsync_writethrough not supported
>open_sync 0.6
>
>in arbitrary units - higher is faster.
>
>Quite impressive!
>
>
>
>
Chris,
Just to make sure the x4100 config is similar to your Linux system, can
you verify the default setting for disk write cache and make sure they
are both enabled or disabled. Here's how to check in Solaris.
As root, run "format -e" -> pick a disk -> cache -> write_cache -> display
Not sure how to do it on Linux though!
Regards,
-Robert
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To: pgsql-performance@postgresql.org
Cc: Robert.Lor@Sun.COM, list@1006.org, josh@agliodbs.com, markir@paradise.net.nz, llonergan@greenplum.com
Subject: Re: bad performance on Solaris 10
In-Reply-To: <4434C505.1000205@sun.com>
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