2V0-622 · Question #172
Refer to the Exhibit. Examine the esxtop command output shown in the Exhibit. Which option would improve application performance for the SlowVM virtual machine?
The correct answer is D. Increase the CPU limit assigned to SlowVM.. The esxtop output shows the VM is being throttled by a CPU limit, so removing or raising that limit is the correct fix.
Question
Refer to the Exhibit. Examine the esxtop command output shown in the Exhibit. Which option would improve application performance for the SlowVM virtual machine?
Exhibit
Options
- AIncrease the number of vCPUs provided to SlowVM.
- BDecrease the number of vCPUs provided to SlowVM.
- CMove SlowVM to another ESXi host with more physical CPU resources available.
- DIncrease the CPU limit assigned to SlowVM.
How the community answered
(25 responses)- A16% (4)
- B24% (6)
- C4% (1)
- D56% (14)
Why each option
The esxtop output shows the VM is being throttled by a CPU limit, so removing or raising that limit is the correct fix.
Adding more vCPUs does not resolve throttling caused by a CPU limit; the scheduler will continue to cap the VM at the same MHz ceiling regardless of vCPU count.
Decreasing the vCPU count reduces the VM's scheduling parallelism and does not address the root cause of a configured resource limit.
Migrating to another host does not help because the CPU limit is a VM-level configuration that travels with the VM and will continue to throttle it on any host.
The esxtop output displays a high %MLMTD (percentage of time the VM was throttled due to a CPU limit), indicating that a configured CPU limit is preventing SlowVM from using available physical CPU cycles. Increasing or removing the CPU limit allows the VM to consume the resources it is entitled to, directly improving application performance.
Concept tested: Diagnosing CPU limit throttling via esxtop %MLMTD counter
Source: https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.resmgmt.doc/GUID-6C7E9858-EB53-4A50-9A66-1D59D43E5C8D.html
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