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4 Replies Last post: Apr 26, 2009 11:51 PM by tom howarth
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99% VM Cpu load on various applications when others run perfectly normal

Apr 25, 2009 9:07 AM

Click to view RSerdoz's profile Novice RSerdoz 4 posts since
Apr 25, 2009

Hello,

Hopefully someone can help. I have a VM View Demo successfully deployed with 30VM instances. The customer is a K-12 School District, and the applications in question are called Kid Pix 4 and Type and Learn 3. I have limited the cpu usage down to as little as 500mhz per VM and the two faulty applications run normally, obviously the others suffer. If I change the limit to 2.4ghz+ those two application still max out the CPU. All other Office, and school applications run just fine. I have tested with the client, the portal, with and without VM Tools.

Any thoughts??

Tags: vdi, vmview, high, cpu, usage
Reply Re: 99% VM Cpu load on various applications when others run perfectly normal Apr 26, 2009 12:06 PM
Click to view lbourque's profile Expert lbourque 534 posts since
Oct 26, 2005 VMware

Hrmm.. Some thoughts off the top of my head:

1. Are all the VMs single vCPU? Have you tried one with two vCPUs to see how things behave?

It may be that those applications have specific issues with being virtualized. IIRC, they are graphics and CPU heavy in genera, are they not? This isn't a View issue as much as it's a VM issue. What version of ESX are you using? Are you using linked clones or provisioned VMs?

Reply Re: 99% VM Cpu load on various applications when others run perfectly normal Apr 26, 2009 8:12 PM
in response to: lbourque
Click to view RSerdoz's profile Novice RSerdoz 4 posts since
Apr 25, 2009

1. Yes, they are all using a single vCPU, and no I have not tried a second Vcpu, great idea.

2. The applications are indeed high graphic and sound oriented, yet I have tested the vm's with quick time player, etc. We are use ESX 3.5U4 and they are linked clones.

I have, however tried provisioned with the same result.

Reply Re: 99% VM Cpu load on various applications when others run perfectly normal Apr 26, 2009 11:49 PM
Click to view tom howarth's profile Guru tom howarth 7,299 posts since
Jul 25, 2005 Moderator
This is a common issue, the only thing I can suggest is to investigate a Application Management program like AppSense Application Manangement (it is part of the AppSense Suite)

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Tom Howarth VCP / vExpert
VMware Communities User Moderator
Blog: www.planetvm.net
Contributing author for the upcoming book "VMware Virtual Infrastructure Security: Securing ESX and the Virtual Environment”.

Reply Re: 99% VM Cpu load on various applications when others run perfectly normal Apr 26, 2009 11:51 PM
in response to: RSerdoz
Click to view tom howarth's profile Guru tom howarth 7,299 posts since
Jul 25, 2005 Moderator
Adding a second CPU would not help you here, I very much doubt that the errant applications are SMP aware. Plus you would be adding alot of un-needed overhead into your environment.

If you found this or any other answer useful please consider the use of the Helpful or correct buttons to award points

Tom Howarth VCP / vExpert
VMware Communities User Moderator
Blog: www.planetvm.net
Contributing author for the upcoming book "VMware Virtual Infrastructure Security: Securing ESX and the Virtual Environment”.

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