Solved

How do we limit VM CPU speed into certain MHz ?

Posted on 2010-09-12
10
3,955 Views
Last Modified: 2012-05-10
Hi All,

In VMware ESXi, how can we limit a certain VM cpu to be just exactly 1.6 GHz for example if we host that VM on 2.66 GHz server ?

Thanks
0
Comment
Question by:jjoz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
10 Comments
 
LVL 40

Expert Comment

by:coolsport00
ID: 33658757
There is no way to config CPU GHz for a VM.

~coolsport00
0
 
LVL 95

Expert Comment

by:John Hurst
ID: 33658802
What you can do, however, is manage the CPU resources a VM uses. That does not manage speed, but it controls how much CPU can be used, which is more important. ... Thinkpads_User
0
 
LVL 1

Author Comment

by:jjoz
ID: 33658804
oh ?

That's why, eventhough i set the option in Resources | CPU | Limit: to be max. 1.6 GHz but in the VM it still runs at 2.66 GHz ?

do i have to put that into the resource pool ?
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 95

Expert Comment

by:John Hurst
ID: 33658815
Take a look at this article on limiting CPU resources

http://www.vmware.com/pdf/ESX2_CPU_Performance.pdf

... Thinkpads_User
0
 
LVL 95

Expert Comment

by:John Hurst
ID: 33658855
Also, I see you are using the free version, and there may be limitations in the free version. I am not sure about that.
... Thinkpads_User
0
 
LVL 1

Author Comment

by:jjoz
ID: 33658871
actually no, this is paid ESXi in VSphere Essentials
0
 
LVL 95

Expert Comment

by:John Hurst
ID: 33658912
You can take a look at this article:

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1004060&sliceId=1&docTypeID=DT_KB_1_1&dialogID=114546247&stateId=0 0 114544471

But it says you must be using ESX to do this. I don't know about ESXi. .... Thinkpads_User
0
 
LVL 95

Expert Comment

by:John Hurst
ID: 33658916
If the link above does not work (too long), the section I read was:

Quote from VMware site "You can only increase the assigned CPU cycles on an ESX Server virtual machine. If this is a virtual machine running under any other product, there is no direct way of increasing its assigned CPU cycles."

... Thinkpads_User
 
0
 
LVL 1

Accepted Solution

by:
jjoz earned 0 total points
ID: 33659558
ah yes, it seems that from my understanding, by setting the upper limit, eg. 1.6 GHz that will be granted to the VM as maximum speed, simple no needto create resource pool since this is only for one single VM.

but Windows will still see and detect the CPU type directly from the hypervisor Info.
0
 
LVL 4

Expert Comment

by:mail2vijay1982
ID: 33661750
Hi Could you please go through following URL, I hope it will clear your doubts.

http://www.yellow-bricks.com/2010/05/18/limiting-your-vcpu/
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If your vDisk VHD file gets deleted from the image store accidentally or on purpose, you won't be able to remove the vDisk from the PVS console. There is a known workaround that is solid.
HOW TO: Upload an ISO image to a VMware datastore for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere Host Client, and checking its MD5 checksum signature is correct.  It's a good idea to compare checksums, because many installat…
This Micro Tutorial steps you through the configuration steps to configure your ESXi host Management Network settings and test the management network, ensure the host is recognized by the DNS Server, configure a new password, and the troubleshooting…
In this video tutorial I show you the main steps to install and configure  a VMware ESXi6.0 server. The video has my comments as text on the screen and you can pause anytime when needed. Hope this will be helpful. Verify that your hardware and BIO…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question