From: Stan Hoeppner <stan@hardwarefreak.com>
To: Dennis Kaarsemaker <dennis.kaarsemaker@booking.com>
Cc: xfs@oss.sgi.com
Subject: Re: XFS IO multiplication problem on centos/rhel 6 using hp p420i raid controllers
Date: Thu, 07 Mar 2013 07:10:47 -0600 [thread overview]
Message-ID: <513891D7.4060801@hardwarefreak.com> (raw)
In-Reply-To: <1362651128.16657.13.camel@seahawk>
On 3/7/2013 4:12 AM, Dennis Kaarsemaker wrote:
> I see, so now I need to find out what's causing the larger average
> request size. Would you happen to know a list of common causes?
Given that mysql is doing the writes, that's the first place to look.
Is the mysql version the same on all machines? If not, what changed
between versions? How about the config? How about the sql code driving
the IO, is it the same? Is this host using a different mysql log or db
file format? Is the logging method the same? Is it writing the same
total amount of data to the filesystem, but just in larger chunks? Etc,
etc.
--
Stan
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next prev parent reply other threads:[~2013-03-07 13:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-28 14:12 XFS IO multiplication problem on centos/rhel 6 using hp p420i raid controllers Dennis Kaarsemaker
2013-02-28 15:34 ` Stan Hoeppner
2013-02-28 19:40 ` Dave Chinner
2013-03-06 13:53 ` Dennis Kaarsemaker
2013-03-07 3:57 ` Dave Chinner
2013-03-07 10:12 ` Dennis Kaarsemaker
2013-03-07 13:10 ` Stan Hoeppner [this message]
2013-03-07 13:33 ` Dennis Kaarsemaker
2013-03-07 13:44 ` Stan Hoeppner
2013-03-07 13:52 ` Dennis Kaarsemaker
2013-03-07 23:00 ` Dave Chinner
2013-03-08 9:09 ` Dennis Kaarsemaker
2013-03-08 11:49 ` Dennis Kaarsemaker
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