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Re: poor mysqldump performance

Subject: Re: poor mysqldump performance
From: Alasdair G Kergon <agk@xxxxxxxxxx>
Date: Fri, 24 Feb 2012 01:29:54 +0000
Cc: dm-crypt@xxxxxxxx
In-reply-to: <20120223222300.GH22456@tracyreed.org>
Mail-followup-to: Tracy Reed <treed@xxxxxxxxxxxxxxx>, dm-crypt@xxxxxxxx
Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: 64 Baker Street, 4th floor, London, W1U 7DF.
References: <20120223222300.GH22456@tracyreed.org>
Sender: dm-crypt-bounces@xxxxxxxx
User-agent: Mutt/1.5.18 (2008-05-17)

Have you done much tuning, in particular /sys/block/<devices>/queue/nr_requests ?

http://www.redbooks.ibm.com/redpapers/pdfs/redp4285.pdf remains a good background
read.

Alasdair
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