CV0-003 Question #583: Real Exam Question with Answer & Explanation

The correct answer is A: Disk I/O limits. VDI slowness only at the start of the workday is a classic boot storm symptom, where simultaneous session startups cause disk I/O saturation and peak RAM demand at the same time.

Troubleshooting

Question

A systems administrator is troubleshooting performance issues with a Windows VDI environment. Users have reported that VDI performance is very slow at the start of the workday, but the performance is fine during the rest of the day. Which of the following is the MOST likely cause of the issue? (Choose two.)

Options

ADisk I/O limits
BAffinity rule
CCPU oversubscription
DRAM usage
EInsufficient GPU resources
FLicense issues

Explanation

VDI slowness only at the start of the workday is a classic boot storm symptom, where simultaneous session startups cause disk I/O saturation and peak RAM demand at the same time.

Common mistakes.

B. Affinity rules constrain VM placement decisions but would cause consistent performance issues throughout the entire day, not only during the morning startup window.
C. CPU oversubscription can degrade performance but is less commonly the primary cause of strictly morning-only slowness compared to the disk and RAM pressure of a boot storm.
E. Insufficient GPU resources would produce consistent sluggishness during graphics-intensive operations at any time of day, not exclusively at startup.
F. License issues would block logins or terminate sessions outright, not cause intermittent slowness confined to the beginning of the workday.

Concept tested. VDI boot storm - disk I/O and RAM oversubscription

Reference. https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-vdi-recommendations

Topics

#VDI performance#disk I/O#RAM contention#boot storm

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