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Re: OS Upgrade Considerations For XFS Volume

To: Bharathiraja P <raja@xxxxxxxxxxxxxxx>
Subject: Re: OS Upgrade Considerations For XFS Volume
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 28 Nov 2014 11:59:30 +1100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <CANoQhnbjv08FVe0iRFff0fNMV7u7POY9kPtAhCbe_Vz=d8kPxg@xxxxxxxxxxxxxx>
References: <CANoQhnbjv08FVe0iRFff0fNMV7u7POY9kPtAhCbe_Vz=d8kPxg@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Thu, Nov 27, 2014 at 07:59:59PM +0530, Bharathiraja P wrote:
> Hi there,
> 
> We recently upgraded our database system from OpenSuSE-11.4 to OpenSuSE-13.1
> 
> Post the upgrade we are noticing load spikes on our database system.

And ...?

Is there any actual performance problem you've measured?

> OpenSuSE 11.4 uses kernel-2.6.37 and OpenSuSE-13.1 uses kernel-3.11.10
> 
> There seems to be some changes related to XFS in new kernel and I'm getting
> this error when I run xfs_logprint
> 
> ==============
> sudo /usr/sbin/xfs_logprint /dev/mapper/pgsql-data
> raja's password:
> xfs_logprint:
> xfs_logprint: /dev/mapper/pgsql-data contains a mounted and writable

logprint is completely unreliable on an active and mounted
filesystem. It's not going to tell you anything useful about any
sort of performance issue - logprint is for debugging log recovery
problems....

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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