VCP-VMC 2024 Question 207
Single answerA company has deployed a mission-critical workload on VMware Cloud on AWS. The workload has recently experienced performance degradation. You are tasked with troubleshooting the issue and notice that the workload's CPU Ready values are significantly high. What is the most appropriate action to resolve the issue?
- A
Increase the number of vCPUs allocated to the virtual machine.
- B
Verify the host's CPU utilization and consider scaling out the cluster by adding more hosts.
- C
Migrate the workload to another host within the cluster using vMotion.
- D
Reduce the number of vCPUs allocated to the virtual machine to match its actual resource demand.
Show answer and explanation
Correct answer: B
Explanation
High CPU Ready values indicate that virtual machines are waiting for physical CPU resources to become available. This is typically caused by CPU overcommitment on the host or cluster. The most effective solution is to reduce contention by scaling out the cluster and adding more physical resources. While other options may provide temporary relief, they do not address the underlying resource contention issue.
- A. Incorrect.
Increasing the number of vCPUs might worsen the CPU contention if the physical host is already overcommitted. This is not the best action to resolve high CPU Ready values.
- B. Correct.
High CPU Ready values often indicate that the physical host is overcommitted on CPU resources. Adding more hosts to the cluster can reduce contention and improve workload performance.
- C. Incorrect.
While migrating the workload to another host might temporarily alleviate performance issues, it does not address the root cause of high CPU contention in the cluster.
- D. Incorrect.
Reducing the number of vCPUs might help in some cases, but it is unlikely to resolve CPU Ready issues caused by host-level overcommitment.