We've found that assigning fewer vCPUs to VMs (we have a non-VDI environment) i.e. 1 instead of 4 can increase performance because the scheduler has to go around fewer cores.
I'll be looking at ordering a new production virtual server in the near future which will be running the latest 2012 R2 and was wondering how significant the number of cores it has is. Is it worth spending the money on 12 or 16 core CPUs instead of a six core in terms of what each VM would be able to utilise of the host hardware?
Is there a point of diminishing returns? If so is there a formula or rule of thumb to work it out?