Home » VMware » 2V0-621 » What would happen if all three virtual machines are powered on?
An administrator has created a resource pool named Marketing HTTP with a Memory Limit of 24 GB and a CPU Limit of 10,000 MHz.
The Marketing HTTP resource pool contains three virtual machines:
Mktg-SQL has a memory reservation of 16 GB.
Mktg-App has a memory reservation of 6 GB.
Mktg-Web has a memory reservation of 4 GB.
What would happen if all three virtual machines are powered on?
A. All three virtual machines can power on, but will have memory contention.
B. All three virtual machines can power on without memory contention.
C. Only two of the three virtual machines can power on.
D. Only one of the virtual machines can power on.
Correct Answer: C
Explanation/Reference:
Explanation:
Applying a limit on a vCPU and memory will slow your VM down no matter what because of distribution of resources. Even if there are no other VMs running on that 4 socket quad core host. Powering on all the virtual machine will enables 100% resources to be used by VM hence, only few required VM’s will powered “On” which requires the maximum utilization from the available resources.
Example: When a single(or two) VM has a limit of 5000MHz and 16GB, 6 GB Memory = 22gb utilization will be high and is the only VM running on a host than it will run it full speed as it will be constantly rescheduled for 5000MHz and maximum memory(22-24 GB)
Check: https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2032906
Or Resource Pool Metrics: https://pubs.vmware.com/…/GUID-6F436275-169F-4DE5-B393-3B771623C0F8.htm.