2V0-32.24 Question 127
Single answerA cloud administrator is tasked with optimizing the performance of a critical application running in a VMware vSphere environment. They notice that the application virtual machine (VM) is experiencing high CPU ready time. Which action should the administrator take to address this issue?
- A
Increase the number of vCPUs allocated to the virtual machine.
- B
Reduce the number of vCPUs allocated to the virtual machine.
- C
Verify and reduce CPU overcommitment on the ESXi host by migrating other VMs.
- D
Enable memory ballooning on the ESXi host.
Show answer and explanation
Correct answer: C
Explanation
High CPU ready time occurs when a VM is waiting for physical CPU resources to become available on the host. This is often caused by CPU overcommitment on the ESXi host, where too many vCPUs are allocated across VMs relative to the physical CPU cores. The best way to address this is to reduce the CPU contention by migrating other VMs to different hosts or reducing the overall CPU demand on the current host.
- A. Incorrect.
Increasing the number of vCPUs can exacerbate high CPU ready time if the ESXi host is overcommitted on CPU resources. This is not the correct action in this scenario.
- B. Incorrect.
Reducing the number of vCPUs will not directly address the issue of high CPU ready time unless the VM's workload does not require as many vCPUs. However, this is not the optimal solution in this case.
- C. Correct.
High CPU ready time typically indicates CPU contention on the ESXi host. Reducing CPU overcommitment by migrating other VMs to a different host can alleviate the contention and improve performance.
- D. Incorrect.
Memory ballooning is a mechanism for managing memory, not CPU. It does not address CPU ready time and is irrelevant in this scenario.