From: Richard Huxton <dev@archonet.com>
To: Ho Fat Tsang <namiwf@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: PostgreSQL 8.0 occasionally slow down
Date: Thu, 28 Jun 2007 09:03:50 +0100
Message-ID: <46836B66.7050109@archonet.com> (raw)
In-Reply-To: <97e6e20f0706280101y543b871ao4cbf85e57f07f7e9@mail.gmail.com>
References: <97e6e20f0706272354m5e42c91em177c8b80abb2ea52@mail.gmail.com>
<468361A9.1040308@archonet.com>
<97e6e20f0706280101y543b871ao4cbf85e57f07f7e9@mail.gmail.com>
Ho Fat Tsang wrote:
> Hi Richard,
>
> I have tuned the checkpoint_timeout to 30 second which is ten times less
> than default and the issue is still reproduced. Do you have any recommended
> configuration for WAL ?
If you look at the output of "vmstat 10" and "iostat -m 10" (I'm
assuming you're on Linux) does it show your I/O peaking every three
minutes? I might have been wrong about the cause.
--
Richard Huxton
Archonet Ltd
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To: pgsql-performance@postgresql.org
Cc: dev@archonet.com, namiwf@gmail.com
Subject: Re: PostgreSQL 8.0 occasionally slow down
In-Reply-To: <46836B66.7050109@archonet.com>
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