Set the number of virtual CPU cores for the virtual machine with the

VirtualMachineConfigSpec.numCPUs

property. Legal values for this property change depending on the

guestosid

value you specify. If you use

VirtualMachineConfigSpec

to update the virtual machine properties, you can omit this property to leave it unchanged.

The guest operating system acts as if it had

numCPUs

cores available at all times, but the host's physical resources are shared by all its virtual machines. The host allocates physical cores in time slices aa backing for virtual cores. For information about how to specify guidance for resource allocation, see Configuring Resource Allocation Constraints for Virtual Machines.

Set the number of cores per CPU chip with the

VirtualMachineConfigSpec.numCoresPerSocket

property. The value must be an integral divisor of

VirtualMachineConfigSpec.numCPUs

. The default value is

1

if the property is omitted for virtual machine creation. If you use

VirtualMachineConfigSpec

to update the virtual machine properties, you can omit this property to leave it unchanged.

Set the RAM size for a virtual machine with the

VirtualMachineConfigSpec.memoryMB

property. If you use

VirtualMachineConfigSpec

to update the virtual machine properties, you can omit this property to leave it unchanged.

The guest operating system acts as if it had

memoryMB

available at all times, but the host's physical resources are shared by all its virtual machines. The amount of physical memory available as backing for virtual machines can vary over time, and it can affect virtual machine performance. For information about how to specify guidance for resource allocation, see Configuring Resource Allocation Constraints for Virtual Machines.