I have several Windows 7, CentOS, and Ubuntu virtual machines running within a VMWare ESXi server. To get better performance while building on them via Jenkins, I would like to increase their number of processors from 1 to 2-4.
The VMWare UI warns me that "Changing the number of virtual CPUs after the guest OS might make your virtual machine unstable".
Is increasing the number of virtual CPUs on these OSes a safe option?
This is the opposite of question Can I safely reduce the number of processors on a VM?
To follow up with my results, I increased the number of processors to 4 on each VM and have seen no problems.