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VMware Exam 5V0-21.21 Topic 2 Question 81 Discussion

Actual exam question for VMware's 5V0-21.21 exam
Question #: 81
Topic #: 2
[All 5V0-21.21 Questions]

An administrator wants to check the performance metrics for the workloads and their virtual disks that are running on a vSAN cluster, but no statistical charts are displayed in the vSphere client.

Why is this behavior being seen?

Show Suggested Answer Hide Answer
Suggested Answer: C

: Some tools allow for measuring latency peaks. This unfortunately isn't ideal, as it can unfairly represent statistical outliers, which may very well occur when there is little to no I/O activity. The best way to understand the actual behavior of VM and application latencies is to observe in time based performance graphs. Depending on the level of detail, you may need to measure at the individual VMDK level. Become familiar with these graphs to determine what is normal, and what is not for that given application. This is where you can use built-in functionality of vCenter and the vSAN performance service metrics to gather this information.


https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-monitoring.doc/GUID-EF27701E-7BAC-4E76-9D2F-E1C58CAAB06D.html

by Roslyn at Apr 04, 2025, 09:59 AM

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Angella
27 days ago
Well, if the vSAN performance service is turned off, how else are they going to measure how fast their virtual disks are spinning? Time to bust out the good old-fashioned stopwatch!
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Junita
28 days ago
A) vSAN network diagnostic mode is not enabled? Guess the admin's network is still playing hide and seek with the performance data.
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Jeannine
3 days ago
B) Maybe the vSAN performance service is turned off.
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Brice
7 days ago
A) vSAN network diagnostic mode is not enabled.
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Tina
1 months ago
D) vSAN performance verbose mode is not enabled? Sounds like someone needs to turn up the volume on their vSAN performance!
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Ben
11 days ago
D) vSAN performance verbose mode is not enabled.
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Cherrie
16 days ago
C) vSAN performance service is turned off.
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Marvel
19 days ago
A) vSAN network diagnostic mode is not enabled.
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Pearlie
2 months ago
Maybe someone forgot to enable vSAN network diagnostic mode as well.
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Malcom
2 months ago
I agree with Irma, that could be why the charts are not showing.
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Aimee
2 months ago
Hmm, maybe B) vSAN proactive tests haven't been run yet. Gotta make sure those tests are good to go before the metrics show up.
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Dominga
3 days ago
It could be D) vSAN performance verbose mode is not enabled.
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Matthew
6 days ago
I agree with B) vSAN proactive tests haven't been run yet.
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Shenika
11 days ago
Maybe A) vSAN network diagnostic mode is not enabled.
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Aileen
17 days ago
I think C) vSAN performance service is turned off.
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Irma
2 months ago
I think the vSAN performance service is turned off.
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Justine
2 months ago
I think the correct answer is C) vSAN performance service is turned off. Without the performance service, there won't be any statistical charts displayed.
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Edelmira
1 months ago
Yes, that's correct. Without the performance service, the metrics won't be available.
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Stephanie
1 months ago
I agree, the performance service needs to be turned on for the statistical charts to be displayed.
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