VMware CPU Question

When I assign 1 vcpu to a VM – how much cpu does this consume on a 2ghz machine?

My server is CPU Cores 12 x 1.999mhz  - what does this mean?
Kelly GarciaSenior Systems AdministratorAsked:
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Miguel Angel Perez MuñozCommented:
You server has 12 cores at 2GHz, you can put 12 virtual CPU´s at 2GHz and uses 100% and your server can do the job. This causes your physical CPU uses goes to 100%.
If you uses 1 vcpu at 2GHz, you reserve about 1/12 of your CPU power, you can not get more than this power but can use less. Since is not usual goes to 100% CPU usage, you can get more than your 12 vcpus because your virtual cpus no even uses physical cpu.
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JohnBusiness Consultant (Owner)Commented:
The answer to your first question is that the virtual machine will consume as much CPU as it needs (just like a real machine). Most machines run at idle much of the time, and so if the machine has been set up properly, it should use very little CPU unless you hand it a big task.

I am not sure about your second question because I do not know your machine. How many cores does Task Manager show you in the performance Tab.
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Kelly GarciaSenior Systems AdministratorAuthor Commented:
how do i put 1 vcpu at 2ghz, i didn't know there was an option to specify that ?
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JohnBusiness Consultant (Owner)Commented:
If your virtual machine is modern, then the CPU is probably managed by adaptive power management and will do its own thing. You (probably) do not want it running a full speed to do ordinary things.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
When you add a socket (vCPU), the VM will detect and use a core on the host processor, up to 2000Mhz or 2000 clock cycles. This is the maximum it can use.

It depends on the Virtual Machine and processes running how much of the 2000 clock cycles it will use.

You host server has 12 Processors all clocked at 2000 clock cycles.
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gheistCommented:
Idle machines consume under 1Mhz on modern CPUs, a bit more when user startes at RDP session...
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