VCP-VMC 2024 Question 175
Select 3An administrator is tasked with optimizing the performance of a VMware vSphere environment running on VMware Cloud. The environment supports a mission-critical application experiencing latency issues during peak workloads. Upon investigation, the administrator discovers that CPU usage is consistently high on several virtual machines (VMs). What performance-tuning steps should the administrator take to resolve the issue?
- A
Enable CPU and Memory Hot Add features on the virtual machines experiencing high CPU usage.
- B
Adjust the CPU shares for the affected virtual machines to 'High' to prioritize resources.
- C
Perform a vMotion operation to migrate the affected virtual machines to hosts with more available CPU resources.
- D
Increase the number of vCPUs assigned to the affected virtual machines to reduce CPU contention.
- E
Verify and ensure VMware Tools is installed and up-to-date on all impacted virtual machines.
Show answer and explanation
Correct answers: B, C, E
Explanation
To optimize performance in a VMware Cloud environment, it is essential to prioritize resources for mission-critical workloads (e.g., adjusting CPU shares), ensure workload distribution is balanced across hosts (e.g., using vMotion), and verify that VMware Tools is up-to-date for optimal performance. These steps directly address the high CPU usage and latency issues described in the scenario, while other options either fail to address the root cause or could introduce additional overhead without proper analysis.
- A. Incorrect.
Enabling CPU and Memory Hot Add can introduce minor overhead due to additional resource tracking, and it does not directly address the root cause of high CPU usage. This option is not relevant in this scenario.
- B. Correct.
Adjusting CPU shares to 'High' ensures that the affected virtual machines are given priority access to CPU resources during contention. This is a valid step for performance optimization.
- C. Correct.
Migrating virtual machines to hosts with more available CPU resources can help balance the workload across the cluster and reduce CPU contention. This is a valid solution for the issue described.
- D. Incorrect.
Increasing the number of vCPUs without understanding the application's requirements or the host's resource availability may lead to further complications, such as increased CPU Ready time. This step is not recommended without further analysis.
- E. Correct.
Keeping VMware Tools up-to-date ensures optimal performance and resource utilization for the virtual machines. It can help mitigate performance issues caused by outdated drivers or tools. This is a valid step.