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Re: [Xen-users] 100% iowait in domU with no IO tasks.

from [Tomasz Chmielewski]

[Permanent Link][Original]

To:	"Bogdan B. Rudas" <brudas@xxxxxxxxxxx>
Subject:	Re: [Xen-users] 100% iowait in domU with no IO tasks.
From:	Tomasz Chmielewski <mangoo@xxxxxxxx>
Date:	Thu, 08 May 2008 11:06:15 +0200
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Bogdan B. Rudas schrieb:

Hi.I entered one of our domU tonight and see following problem:

# iowait -k 5

avg-cpu:  %user   %nice %system %iowait  %steal   %idle

           0.00    0.00    0.00  100.00    0.00    0.00

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda1              0.00         0.00         0.00          0          0
sda2              0.00         0.00         0.00          0          0

I check other domU and dom0 on same server - there were high iowait: from 20% 
to 50% with few transactions per second and about 0.1-1.5 Mb/sec storage 
bandwith usage per domU. This domU have no disk IO at all but show LA 15 and 
possible higher.


Did you check for processes in a "D" state?

ps aux | grep " D"



--
Tomasz Chmielewski
http://wpkg.org

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[Xen-users] 100% iowait in domU with no IO tasks., Bogdan B. Rudas Re: [Xen-users] 100% iowait in domU with no IO tasks., Tomasz Chmielewski <= Re: [Xen-users] 100% iowait in domU with no IO tasks., Maarten Vanraes Re: [Xen-users] 100% iowait in domU with no IO tasks., Nick Anderson Re: [Xen-users] 100% iowait in domU with no IO tasks., Marco Strullato Re: [Xen-users] 100% iowait in domU with no IO tasks., Maarten Vanraes Re: [Xen-users] 100% iowait in domU with no IO tasks., Marco Strullato Re: [Xen-users] 100% iowait in domU with no IO tasks., Maarten Vanraes

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