2V0-622D · Question #134
An administrator has an application that requires high CPU throughput. Which action would ensure that the application gets the required throughput?
The correct answer is D. Adjust the virtual machine latency sensitivity.. Setting a virtual machine's latency sensitivity to High causes vSphere to reserve dedicated CPU and memory resources for that VM, reducing hypervisor scheduling overhead and maximizing CPU throughput for demanding applications.
Question
An administrator has an application that requires high CPU throughput. Which action would ensure that the application gets the required throughput?
Options
- AEnable Fault Tolerance on the virtual machine.
- BDisable Fully Automated DRS.
- CSet a CPU limit on the virtual machine.
- DAdjust the virtual machine latency sensitivity.
How the community answered
(42 responses)- A5% (2)
- B2% (1)
- C10% (4)
- D83% (35)
Why each option
Setting a virtual machine's latency sensitivity to High causes vSphere to reserve dedicated CPU and memory resources for that VM, reducing hypervisor scheduling overhead and maximizing CPU throughput for demanding applications.
Fault Tolerance imposes a vCPU count limit (typically 8 vCPUs per protected VM) and adds continuous record-replay overhead, which would reduce rather than increase CPU throughput.
Disabling Fully Automated DRS prevents automatic vMotion load balancing but does not allocate additional or reserved CPU resources to any VM, so it has no direct positive effect on throughput.
Setting a CPU limit places an upper cap on the CPU cycles the VM can consume, which would restrict throughput rather than guarantee it.
The Latency Sensitivity setting, when configured to High, instructs the vSphere scheduler to reserve exclusive CPU resources and use a more aggressive scheduling policy that minimizes co-scheduling delays. This reduces the overhead introduced by the hypervisor, giving the application more direct and consistent access to CPU cycles and increasing overall CPU throughput. It is the correct mechanism for workloads that require sustained, high CPU performance rather than just low latency.
Concept tested: VM latency sensitivity setting for CPU throughput
Source: https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-resource-management/GUID-03E6B40C-3BCC-4968-B54E-61A5B3E1E970.html
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