Given a Scenario, Optimize the Performance of a Virtual Machine Within a VCF Workload Domain VCAP-VCF-SUPPORT Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   A VM in a VCF Workload Domain is experiencing slow disk I/O. The administrator reviews performance charts and sees high 'disk latency' but low 'disk throughput'. Which bottleneck is most likely indicated by these metrics?

   • AMemory bottleneck
   • BStorage bottleneck
   • CCPU bottleneck
   • DNetwork bottleneck
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A VM requires very low network latency for a high-performance application. Which network adapter type is designed to provide the lowest latency by allowing the VM to directly access the physical network adapter?

   • AVMXNET3
   • BVMXNET2
   • CSR-IOV
   • DE1000
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A VCF administrator has a VM that runs a batch processing workload. The VM is configured with 4 vCPUs and a CPU limit of 2 GHz. The workload is CPU-intensive and the VM is experiencing high ready time. The host has plenty of idle CPU capacity. What should the administrator do to improve performance?

   • AIncrease the CPU limit to 4 GHz.
   • BIncrease the CPU reservation to 4 GHz.
   • CAdd more vCPUs to the VM.
   • DIncrease the CPU shares for the VM.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A VCF administrator is optimizing a VM that runs a high-transaction database. The VM's virtual disk is on a vSAN datastore. Performance monitoring shows high latency on the virtual disk. The administrator wants to improve storage performance without changing the VM's disk size. Which action is most likely to reduce disk latency?

   • AChange the VM's storage policy to a policy with a higher number of failures to tolerate (FTT).
   • BChange the VM's disk provisioning from thin to thick eager zeroed.
   • CEnable Storage I/O Control (SIOC) on the datastore and set a high share value for the VM.
   • DMove the VM's disk to a storage policy that uses a faster storage tier, such as all-flash.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   An administrator is configuring a VM with 8 vCPUs on a host with two NUMA nodes. To optimize CPU performance, what is the recommended practice for NUMA placement?

   • AEnsure the VM's vCPUs and memory are distributed across NUMA nodes to keep memory local to each vCPU
   • BPlace the VM on a single NUMA node to avoid remote memory access
   • CSpread the vCPUs across both NUMA nodes to balance load
   • DAssign all vCPUs to one NUMA node and all memory to the other
   Reveal Solution Discussion Select an answer first