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Over provisioning vCPUs can cause your VM to run slow

I came across a nice article today explaining various inside outs of vCPUs in VMware ESXi. It talks starting from how vCPUs are formed and its relation with physical CPUs, how multi-threading effects no. of vCPUs, and more importantly how over provisioned vCPUs can cause your Virtual machine to run slow compared with virtual machines with single vCPU.


I feel its worth reading..