RE: XP guests sluggish after around 1 week of uptime

["jmandawg" <jmandawg@hotmail.com>]

It's definitely some kind of Disk IO problem, I can't even copy a 700MB file
on that guest without waiting a loooong time.  Running bonnie on my linux
guest shows considerable slow down in disk performance.

Results after a fresh Reboot of the Host:

root@wserver:~# cat bonnieresults.txt
Version 1.03b       ------Sequential Output------ --Sequential Input-
--Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec
%CP
wserver        1G 10617  23 12241   1 10328   2 47915  93 301061  93  5095
98
                    ------Sequential Create------ --------Random
Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec
%CP
                 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++
+++
wserver,1G,10617,23,12241,1,10328,2,47915,93,301061,93,5094.8,98,16,+++++,++
+,                    +++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++

Results after noticing considerable slow down on other guest machine:

root@wserver:~# cat bonnieresults_SLOW.txt
Version 1.03b       ------Sequential Output------ --Sequential Input-
--Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec
%CP
wserver        1G  2252   3  3771   0  6844   1 46057  70 355858  50 752.3
7
                    ------Sequential Create------ --------Random
Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec
%CP
                 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++
+++
wserver,1G,2252,3,3771,0,6844,1,46057,70,355858,50,752.3,7,16,+++++,+++,++++
+,                    +++,+++++,+++,+++++,+++,+++++,+++,+++++,+++

After a reboot of the host, they guest are fine again, but for how long...

Any advice or suggestions?

Thanks,

-J

-----Original Message-----
From: Avi Kivity [mailto:avi@redhat.com] 
Sent: Tuesday, January 13, 2009 4:29 AM
To: Jay
Cc: kvm@vger.kernel.org
Subject: Re: XP guests sluggish after around 1 week of uptime

Please keep the cc list when replying (use reply-all).


Jay wrote:
> Avi Kivity <avi <at> redhat.com> writes:
>
>   
>> How much memory do you have on the host?  Is the host swapping?  Can you 
>> post 'vmstat 1' output while Windows is opening the start menu?
>>
>>     
>
> I have 8GB RAM on the host, and i've run htop and the swap space is not
being
> used at all.  I have a total of 4 guest (2 windows + 2 linux)
>
> I will have to try the 'vmstat 1' command tonight when i get home from
work.

Provide kvm_stat output as well.

-- 
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