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VM licensing

We are currently running ESXi 5.5 hypervisor ( free version) we would like to stay on the version

The Host has 4 Physical CPUs

i am trying to assign one of the VM's with 16 cores but get a message maximum allow is 8way SMP

what version of ESXI do i need to allow this? VMware directly give me different answers very time i call them


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Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

8/22/2022 - Mon
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

If you really need to allocate 16 vCPUs to a virtual machine, these are the licensed versions required.

a VMware vSphere Standard license is require per CPU, so you will need

4 x VMware vSphere Standard license , and Basic or Production Support, for 1 or 3 years.

Mr Tortu(r)e

+1 for Andrew Hancock.
But are you sure you need 16 vcpu? this is pretty uncommon..

CORRECTION: i need to allow more then 8 vcpus to a VM which will be a RDP server. may not use all 16vcpu's but would like to add more then 8vcpus
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William Peck
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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Lee W, MVP

You really should rethink the idea of assigning 16 or even 8 vCPU.  The scheduling of threads requires that all CPUs be idle to execute once and if the server is hosting more than 1 VM (which is generally the point), doing what you want can seriously slow you down.  I'd suggest you read this:

As others have suggested, start with 2 and increase as needed.  You DO NOT need one CPU per concurrent user.  CPUs are often idle and in an RDS system can support 4-10 users OR MORE per CPU in most RDS loads.

Thanks for the info guys - the RDP server is heavily used by approx 50 users

This will be the third RD server that will be going on site to load balance users - there is a third party app installed which is resource hungry but it is also the company's core application
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

As I've stated, scale out, not increase resources per server, it does not scale.

Reduce numbers of concurrent users per server, 50 is a lot, I would half to 25.

You may want to look at the costs of Windows licenses versus VMware vSphere Standard per Host CPU, plus support....and stay with FREE.
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