VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

What is a key indication that another VM on the same ESXi host may be affecting the performance of a specific VM?

1. The CPUs of the affected VM are frequently at 100% usage

2. Memory reservations are higher than active memory of VMs

3. Another VM has a higher number of vCPUs allocated

4. Another VM is powered off

The correct answer is: The CPUs of the affected VM are frequently at 100% usage

A key indication that another VM on the same ESXi host may be affecting the performance of a specific VM is when the CPUs of the affected VM are frequently at 100% usage. High CPU usage can signify that the VM is struggling to meet its resource demands, which could be a direct impact of resource contention on the host. If other VMs on the same ESXi host are utilizing a significant amount of CPU resources, the affected VM may not receive the CPU cycles it requires, thereby leading to performance degradation. Monitoring CPU usage is essential in a virtualized environment; consistently high CPU usage can indicate that the VM requires more resources than what is allocated or that competing VMs are consuming excessive resources, resulting in throttling for the affected VM. This scenario often arises when multiple VMs are over-provisioned, leading to contention for resources on the host. The other options do not directly indicate that another VM is impacting performance in the same manner. For instance, high memory reservations relative to active memory may suggest inefficient resource allocation, but it does not specifically point to interference from other VMs. Similarly, a higher number of vCPUs allocated to another VM does not inherently mean that it is consuming resources in a way that negatively impacts another VM