Re: Disk latency goes up during certaing pediods

From: bricklen <bricklen(at)gmail(dot)com>
To: German Becker <german(dot)becker(at)gmail(dot)com>
Cc: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: Disk latency goes up during certaing pediods
Date: 2013-07-31 16:34:22
Message-ID: CAGrpgQ_mBsodiY=BedBHFvzMbZDQr+awYiVv+bpmEscGn3kJnw@mail.gmail.com
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On Wed, Jul 31, 2013 at 9:25 AM, German Becker <german(dot)becker(at)gmail(dot)com>wrote:

> To all whom might be interested, I have an update on this.
> I run some tests on the old production DB which was Posgres 8.3 (and only
> one disk for everything), using pgreplay, running the same queries as the
> 9.1 server.
> Here is the output of iostat for the 8.3 server:
> ...
> Here is the output for 9.1:
> ...
>

What kernel are you running? Could it be related to a recent discussions
about the 3.2 kernel?
http://markmail.org/message/qosngswoy5lqmxlr

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