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[Xen-users] Detecting I/O contention

from [John A. Sullivan III]

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To:	Xen User List <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-users] Detecting I/O contention
From:	"John A. Sullivan III" <jsullivan@xxxxxxxxxxxxxxxxxxx>
Date:	Sat, 11 Nov 2006 12:55:30 -0500
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We are experiencing cripplingly slow performance in some of our domUs on
a Xen 2.0.7 host.  There is plenty of CPU available, plenty of RAM and
plenty of disk space.  We suspect the issue is either network or disk
I/O contention.  How does one detect excessive disk or network I/O
contention in Xen?

We do notice the "event" process in the dom0 frequently consuming 40% to
50% of the CPU cycles.  I assume this is a bad thing. Is that correct?
-- 
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan@xxxxxxxxxxxxxxxxxxx

If you would like to participate in the development of an open source
enterprise class network security management system, please visit
http://iscs.sourceforge.net


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