The ESXi Summary tab and Resource Allocation tab do not show the same values for memory and CPU

Products

• VMware vCenter Server

Issue/Introduction

This article provides information on how the ESXi Summary tab displays CPU and memory totals in comparison to the Resource Allocation tab.

Symptoms:

• The Summary tab and the Resource Allocation tab in an ESXi host do not show the same value for memory and CPU.
• The Summary tab and the Resource Allocation tab show different values for memory and CPU.

Environment

VMware vCenter Server 4.1.x
VMware vCenter Server 5.5.x
VMware vCenter Server 5.1.x
VMware vCenter Server 5.0.x

Resolution

The ESXi host Summary tab displays the values for the installed CPU and memory. It is a representation of the physical CPU and memory hardware that is installed in the ESXi host and presented by the BIOS.

The ESXi or Cluster Resource Allocation tab displays three values:

• Total Capacity – Amount of resource that is guaranteed to be available to the resource pool (ESXi host).
• Reserved Capacity – Total amount of resources that have been used for the reservation requirements of all descendants of the resource pool. This includes both child resource pools and virtual machines.
• Available Capacity – Total amount or resources available for reservation of a child virtual machine.

The values in the Resource Allocation tab are the resources, with the system resource pools already subtracted.

Note: An ESXi host is treated as a resource pool.

Additional Information

ESXi の [サマリ] タブと [リソース割り当て] タブに表示されるメモリと CPU の値が一致しない
ESXi 的“摘要”选项卡和“资源分配”选项卡显示的内存及 CPU 值不相同