vSphere 6 vCPU（虚拟CPU）与pCPU（物理CPU）的配额比率（超额配比率）
vSphere虚拟化的主要优势之一是超额分配的能力，因此可以分配给虚拟机的vCPU数量与主机中物理CPU数量之间当然没有1：1的比率。对于vSphere 6.0，每个物理核心最多可以有32个vCPU，并且vSphere管理员最多可以为单个主机上的虚拟机分配4,096个vCPU。
官方原文：one of the major advantages of vSphere virtualization is the ability to oversubscribe, so there is of course no 1:1 ratio between the number of vCPUs that can be assigned to virtual machines and the number of physical CPUs in the host. For vSphere 6.0, there is a maximum of 32 vCPUs per physical core, and vSphere administrators can allocate up to 4,096 vCPUs to virtual machines on a single host