RE: XP guests sluggish after around 1 week of uptime

jmandawg
2009-01-19T04:03:11Z

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.