VM CPU Workload (%) Discrepancy between Aria Operations (formerly vRealize Operations) and Guest OS Task Manager

Products

• VMware Aria Suite

Issue/Introduction

The CPU utilization observed on the VM in Task Manager at a Guest OS level appears to not match the "CPU|Workload (%)" metric for the VM in Aria Operations.

Environment

Aria Operations 8.x

Cause

The observed discrepancy in values between the Guest OS and "CPU|Workload (%)" metric is due to the metric being a derived metric from multiple metric collections which is collected at the ESXi Host level.

Resolution

The CPU Workload % shown for the VM in Aria Operations is the correct value and reflects the "CPU|Demand (MHz)" and "CPU|Total Capacity (MHz)" metric collected from the VM at a ESXi host level.

The Virtual Machine Workload (%) metric is calculated using the following formula: CPU|Workload (%) = [CPU|Demand (MHz) / CPU|Total Capacity (MHz)] * 100

 

Additional Information

For monitoring Guest OS level specific metrics we recommend using leveraging the OS and Application monitoring functionality of Aria Operations.