Your network contains an Active Directory domain named contoso.com. The domain contains a member server
named Server1. Server1 runs Windows Server 2012 R2 and has the Hyper-V server role installed.
Server1 hosts 10 virtual machines. A virtual machine named VM1 runs Windows Server 2012 R2 and hosts a
processor-intensive application named App1.
Users report that App1 responds more slowly than expected.
You need to monitor the processor usage on VM1 to identify whether changes must be made to the hardware
settings of VM1.
Which performance object should you monitor on Server1?
A.
Processor
B.
Hyper-V Hypervisor Virtual Processor
C.
Hyper-V Hypervisor Logical Processor
D.
Hyper-V Hypervisor Root Virtual Processor
E.
Process
Explanation:
In the simplest way of thinking the virtual processor time is cycled across the available logical processors in a
round-robin type of fashion. Thus all the processing power gets used over time, and technically nothing ever
sits idle.
To accurately measure the processor utilization of a guest operating system, use the “\Hyper-V Hypervisor
Logical Processor(Total)\% Total Run Time” performance monitor counter on the Hyper-V host operating
system.
But y want to monitor only vm1, while the logic process monitor will tell y how much of all the processor y use
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i also go with B. Hyper-V Hypervisor Virtual Processor
show you the processor usage of the virtual processor assigned to VM1
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Awnser is C: https://msdn.microsoft.com/en-us/library/cc768535(v=bts.10).aspx
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the strange thing is that in this article is stated you should monitor LTPR *and* VPTR:
“If LPTR is high and VPTR is low then verify that there are not more processors allocated to virtual machines than are physically available on the physical computer”
“If VPTR is high and LPTR is low then consider allocating additional processors to virtual machines if there are available logical processor”
to bring in more confusion, how to consider the workload of the other 10 VMs they mentioned in the description?
I think VPTR might give more reasonable results because LPTR also considers the workload of all other VMs and question asks about maybe hardware change of only VM1 and not all the others…otherwise the flowchart later in the article says the first thing you have to check is LPTR :-/
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Agree with answer
“To accurately measure the processor utilization of a guest operating system, use the “\Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time” performance monitor counter on the Hyper-V host operating system. Use the following thresholds to evaluate guest operating system processor utilization using the “\Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time” performance monitor counter:”
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Question is asking if changes in hardware settings of VM1 are needed, not for the host utilization. What needs to be measured is processor time of VM itself. I would go with B.
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https://msdn.microsoft.com/en-us/library/cc768535%28v=bts.10%29.aspx
According to this article, you should measure both. It gets rather detailed but remember, virtual processors relate to how many are allocated to each core of a logical processor. For example, 2 quad core processors installed on the physical computer would correlate to 8 logical processors.
Virtual processors to logical processors: https://technet.microsoft.com/en-us/library/ee941148%28v=ws.10%29.aspx
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B
“You need to monitor the processor usage on VM1 to identify whether changes must be made to the hardware settings of VM1.”
we can change olny Virtual Processor in settings VM
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C.
Measure overall processor utilization of the Hyper-V environment using Hyper-V performance monitor counters – For purposes of measuring processor utilization, the host operating system is logically viewed as just another guest operating system. Therefore, the “\Processor(*)\% Processor Time” monitor counter measures the processor utilization of the host operating system only. To measure total physical processor utilization of the host operating system and all guest operating systems, use the “\Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time” performance monitor counter. This counter measures the total percentage of time spent by the processor running the both the host operating system and all guest operating systems. Use the following thresholds to evaluate overall processor utilization of the Hyper-V environment using the “\Hyper-V Hypervisor Logical Processor(_Total)\% Total Run Time” performance monitor counter:
Less than 60% consumed = Healthy
60% – 89% consumed = Monitor or Caution
90% – 100% consumed = Critical, performance will be adversely affected
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Very poorly worded question, typically ambiguous true to Microsoft form. I would agree with the given answer of C. If you parse the wording of the question, they are asking about determining what, if any changes, are necessary to make on the hardware settings of VM1. So VM1 is the focus of this question. The above explanation seems to be spot-on IMO.
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B
Answer is B… The important part to read is in ( )
You need to monitor the processor usage on VM1 (to identify whether changes must be
made to the hardware settings of VM1.)
Answer is always in the minute details.
From TechNet if you can actually read the whole thing… ” If VPTR is high and LPTR is low then (consider allocating additional processors to virtual machines)
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Correct answer is B not C although you should measure both to determine the processor time. B relates specifically to the VM in the question (VM1) whereas C refers to the logical processors that are used for the entire Hyper-V Host.
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