Action Details - vCPU resizes for on-prem VMs

The Action Details page provides a comprehensive set of information to help you understand why Turbonomic recommends a vCPU resize down action and the impact of this action on the VM and its host.

Actions to resize down vCPU can result in significant performance improvements in environments where CPU Ready on virtualization hosts is high.

Action Details Page

Addressing CPU ready issues by resizing down vCPU

CPU Ready is a measurement of how long a VM is waiting for access to the host's physical CPU. In VMware environments, a CPU Ready value of 5% (or 1000 milliseconds) is considered a performance risk for general purpose VMs. As the VM and its application increase in priority/performance requirements, the acceptable CPU Ready value decreases.

To identify risks related to CPU Ready in your environment, add the Top Host Clusters by Utilization chart to your dashboard and then sort the chart data by CPU Ready.

Top Host Clusters by Utilization chart

As you examine the pending actions for these clusters, check for actions to resize down VM vCPU and then prioritize them for execution. These actions offer the greatest opportunity to resolve CPU Ready issues.