CPUs and VMs

[Weston3000]

In hyperV, when I assign a VM 1 cpu, does it mean that I have assigned it a physical core or logical core?

[Sir Asvald]

No, you're assigning it a virtual CPU with a Virtual core. shown below

 

 

Also read this:

https://www.altaro.com/hyper-v/hyper-v-virtual-cpus-explained/

 

[Weston3000]

How do I know how many virtual processors my CPU supports and how virtual processors should I assign a VM.

[Electronics Wizardy]

5 hours ago, Weston3000 said:

How do I know how many virtual processors my CPU supports and how virtual processors should I assign a VM.

Your can run as many virtual processors on one cpu, something like 4:1 is pretty common for servers, but depends on workload.

 

Depends on vm, id probalby give each vm 2 by default, and more if needed.

[Sir Asvald]

19 hours ago, Weston3000 said:

How do I know how many virtual processors my CPU supports and how virtual processors should I assign a VM.

Please quote so I know you have replied.

 

It depends on the server's CPU. 

 

please read the article I posted before, it will explain everything.

[Dyaets]

While a really good article on Altaro was shared explaining the logic behind the vCPU, just wanted to add that you actually have to test what number of vCPUs is required for your VM or, actually, the service/app running inside of it. You can start from one and then add more if required. Here is also some useful reading on this as well as overall Hyper-V performance tuning: https://www.hyper-v.io/several-tips-hints-full-throttle-hyper-v-performance/