2V0-32.24 Question 129
Select 2A cloud administrator is troubleshooting a VMware vSphere environment where multiple virtual machines (VMs) are experiencing performance degradation. Upon investigation, the administrator notices high CPU Ready values and concludes that CPU contention might be the root cause. Which of the following actions should the administrator take to resolve this issue?
- A
Increase the CPU shares for the affected virtual machines.
- B
Reduce the number of vCPUs allocated to the affected virtual machines.
- C
Migrate some virtual machines to another ESXi host with available CPU resources using vMotion.
- D
Enable CPU affinity to dedicate specific physical cores to the affected virtual machines.
- E
Increase the CPU reservation for the affected virtual machines.
Show answer and explanation
Correct answers: B, C
Explanation
High CPU Ready values indicate that virtual machines are waiting for physical CPU resources to become available, often caused by overcommitment or contention. Reducing the number of vCPUs can lower the scheduling overhead, and using vMotion to redistribute workloads can help balance resource utilization across ESXi hosts. These actions address the root cause of the issue, unlike increasing shares or reservations, which mainly adjust resource prioritization without resolving contention.
- A. Incorrect.
Increasing CPU shares will only change the prioritization of CPU resources during contention but will not directly address the root cause of high CPU contention.
- B. Correct.
Reducing the number of vCPUs can help alleviate CPU contention by reducing the scheduling overhead and making it easier for the hypervisor to allocate resources efficiently.
- C. Correct.
Migrating virtual machines to another ESXi host with available CPU resources helps balance the load and reduces contention on the current host.
- D. Incorrect.
Enabling CPU affinity is not recommended in most scenarios as it limits the flexibility of the hypervisor to schedule workloads dynamically and could lead to further inefficiencies.
- E. Incorrect.
Increasing CPU reservations guarantees a minimum amount of CPU resources for the virtual machines but does not address the contention issue if the host is already overcommitted.