When you deploy the vCenter Server Appliance, you can select to deploy an appliance that is suitable for the size of your vSphere environment. The option that you select determine the number of CPUs and the amount of memory that the appliance will have.

The hardware requirements such as number of CPUs and memory depend on the size of your vSphere inventory.

Table 1. Hardware Requirements for VMware vCenter Server Appliance
Resources Platform Services Controller Tiny Environment (up to 10 Hosts, 100 Virtual Machines) Small Environment (up to 100 Hosts, 1,000 Virtual Machines) Medium Environment (up to 400 Hosts, 4,000 Virtual Machines) Large Environment (up to 1,000 Hosts, 10,000 Virtual Machines)
Number of CPUs 2 2 4 8 16
Memory 2 GB RAM 8 GB RAM 16 GB RAM 24 GB RAM 32 GB RAM
Important: For vCenter Server Appliance with an embedded Platform Services Controller, you must add the hardware requirements for Platform Services Controller to the hardware requirements for vCenter Server Appliance depending on the size of your environment.