Hello Im fairly new to hyper-v and i have some questions regarding cpu usage. I have a hyper-v machine with 2 quad core processors. I also have 3 virtual machines running on the server. 1 server is a production server and i want to give almost allresources to this one. In the hyper-v settings i can only set 4 processors(cores?) to the machine. Hwen i log in to this machine i see it runs with 4 cores (ctrl + alt + del). The other 2 machines are development machine witch will be scraped soon. I have set them to get 2 cpus each but the task manager only shows 1 core instead of 2.<br/><br/>Is there any way i can make the production server run on 6 cores or is 4 maximum? is 4 cores maximum for a VM, or have i got it all wrong?<br/><br/>I want to make sure that when i install other Hyper-v machines, these will run with optimal resources allocated to them.<br/>© 2009 Microsoft Corporation. All rights reserved.Mon, 06 Jul 2009 09:56:23 Z1841c2f2-c9c7-444c-87db-324fb7a56f4ahttp://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/1841c2f2-c9c7-444c-87db-324fb7a56f4a#1841c2f2-c9c7-444c-87db-324fb7a56f4ahttp://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/1841c2f2-c9c7-444c-87db-324fb7a56f4a#1841c2f2-c9c7-444c-87db-324fb7a56f4aFlummerhttp://social.technet.microsoft.com/Profile/en-US/?user=FlummerHello Im fairly new to hyper-v and i have some questions regarding cpu usage. I have a hyper-v machine with 2 quad core processors. I also have 3 virtual machines running on the server. 1 server is a production server and i want to give almost allresources to this one. In the hyper-v settings i can only set 4 processors(cores?) to the machine. Hwen i log in to this machine i see it runs with 4 cores (ctrl + alt + del). The other 2 machines are development machine witch will be scraped soon. I have set them to get 2 cpus each but the task manager only shows 1 core instead of 2.<br/><br/>Is there any way i can make the production server run on 6 cores or is 4 maximum? is 4 cores maximum for a VM, or have i got it all wrong?<br/><br/>I want to make sure that when i install other Hyper-v machines, these will run with optimal resources allocated to them.<br/>Fri, 03 Jul 2009 12:00:22 Z2009-07-03T12:00:22Zhttp://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/1841c2f2-c9c7-444c-87db-324fb7a56f4a#f253657b-b38e-4a14-b376-f961deac2f05http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/1841c2f2-c9c7-444c-87db-324fb7a56f4a#f253657b-b38e-4a14-b376-f961deac2f05John Paul Cookhttp://social.technet.microsoft.com/Profile/en-US/?user=John%20Paul%20CookFour cores is the most you're going to be able to allocate to a Hyper-V virtual machine.<br/><br/>There is some confusion over this, but that's the limit. There have been changes to the maximum number of virtual processors supported for the overall Hyper-V server as well the maximum number of virtual machines supported. For example, this update <a href="http://www.microsoft.com/downloads/details.aspx?FamilyID=fe36823a-7e5a-4262-9bf5-d6b3ae3ad375&amp;DisplayLang=en">http://www.microsoft.com/downloads/details.aspx?FamilyID=fe36823a-7e5a-4262-9bf5-d6b3ae3ad375&amp;DisplayLang=en</a> increases the maximum number of virtual processors from 16 to 24. Installing this update doesn't change the fact that you are still limited to allocating 4 virtual processors to a single virtual machine. Also, this update won't help you because you don't have that many physical cores in the first place.<br/><br/>You may be interested in using the <strong>Virtual Machine Reserve</strong> and <strong>Virtual Machine Limit</strong> settings described here: <a href="http://www.virtualizationadmin.com/articles-tutorials/microsoft-hyper-v-articles/load-balancing-high-availability/resource-allocation-hyper-v-part3.html">http://www.virtualizationadmin.com/articles-tutorials/microsoft-hyper-v-articles/load-balancing-high-availability/resource-allocation-hyper-v-part3.html</a>. You could use the Virtual Machine Reserve to ensure that your production vm gets a specified minimum aamount of resources.Fri, 03 Jul 2009 12:18:48 Z2009-07-03T12:18:48Z