From: Mark Kirkwood <markir@paradise.net.nz>
To: Chris Mair <list@1006.org>
Cc: pgsql-performance@postgresql.org
Cc: josh@agliodbs.com
Cc: llonergan@greenplum.com
Subject: Re: bad performance on Solaris 10
Date: Thu, 06 Apr 2006 11:25:36 +1200
Message-ID: <443451F0.5060605@paradise.net.nz> (raw)
In-Reply-To: <1144272685.4562.43.camel@dell.home.lan>
References: <1144111178.3723.80.camel@dell.home.lan>
<1144272685.4562.43.camel@dell.home.lan>
Chris Mair wrote:
> Hi,
>
> thanks for all replys.
>
> I've done a few tests.
>
> Remounting the fs where $PGDATA lives with "forcedirectio"
> (together with logging, that is default) did not help
> (if not harm...) performance.
>
>
Sure - forcedirectio on the entire $PGDATA is a definite loss, you only
want it on $PGDATA/pg_xlog. The usual way this is accomplished is by
making a separate filsystem for pg_xlog and symlinking from $PGDATA.
Did you try the other option of remounting the fs for $PGDATA without
logging or forcedirectio?
Cheers
Mark
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: markir@paradise.net.nz, list@1006.org, josh@agliodbs.com, llonergan@greenplum.com
Subject: Re: bad performance on Solaris 10
In-Reply-To: <443451F0.5060605@paradise.net.nz>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox