2V0-21.23 Question 383
Single answerAn administrator is tasked with optimizing the performance of virtual machines (VMs) in a vSphere 8.0 environment. The administrator notices that some VMs are experiencing high CPU Ready times, which are affecting their responsiveness. What is the most appropriate action to resolve this issue?
- A
Increase the number of virtual CPUs (vCPUs) allocated to the affected VMs.
- B
Reduce the number of vCPUs allocated to the affected VMs.
- C
Migrate the affected VMs to a host with more available CPU resources using vSphere vMotion.
- D
Enable CPU affinity to bind the affected VMs to specific physical CPU cores.
Show answer and explanation
Correct answer: C
Explanation
High CPU Ready times indicate that VMs are waiting for CPU resources to become available because of contention on the host. The most appropriate solution is to distribute workloads more evenly across available resources. Migrating the affected VMs to a host with more available CPU resources using vSphere vMotion effectively resolves the issue without requiring changes to VM configuration or reducing the flexibility of the environment.
- A. Incorrect.
Increasing the number of vCPUs can worsen the issue because it may increase contention for CPU resources, further increasing CPU Ready times.
- B. Incorrect.
Reducing the number of vCPUs can sometimes help, but it is not the most appropriate action in this scenario since the issue relates to host CPU contention, not VM configuration.
- C. Correct.
Migrating the affected VMs to a host with more available CPU resources using vSphere vMotion is the most effective way to address CPU contention and reduce CPU Ready times.
- D. Incorrect.
While CPU affinity can improve performance in specific scenarios, it can also reduce the flexibility of the hypervisor to efficiently schedule workloads. This is not the best solution for addressing high CPU Ready times in a virtualized environment.