-- Exhibit —
-- Exhibit —
What is indicated by the performance chart shown?
A. Guest memory is overcommitted.
B. Host memory is overcommitted.
C. Host is I/O constrained.
D. Guest is I/O constrained.
Correct Answer: B
Explanation/Reference:
Explanation:
B: Host memory must be large enough to accommodate virtual machine workload. Transient high-usage values usually do not cause performance degradation. For example, memory usage can be high when several virtual machines are started at the same time or when there is a spike in virtual machine workload.
However, a consistently high memory usage value (94% or greater) indicates the host does not have the memory resources required to meet the demand. If the memory balloon and swap values are not high, performance is probably not affected. If the memory usage value is high, and the host has high ballooning or swapping, check the amount of free physical memory on the host. A free memory value of 6% or less indicates that the host requires more memory resources.
The exhibit shows that roll-up type average (minimum/maximum) as problematic. Thus the Host memory is overcommitted.
Incorrect Answers:
A: Guest memory is not the issue here; it is the host memory that is showing swap-in and swap-out rate that is problematic.
C: The I/O operation is not indicating problems.
D: Her I/O operation is not indicating problems.
References:
https://pubs.vmware.com/vsphere-51/index.jsp#com.vmware.vsphere.monitoring.doc/GUID-CD6B417B-F1EC-4698-BE1E-B78B03986EFC.html
Explanation/Reference:
Explanation:
B: Host memory must be large enough to accommodate virtual machine workload. Transient high-usage values usually do not cause performance degradation. For example, memory usage can be high when several virtual machines are started at the same time or when there is a spike in virtual machine workload.
However, a consistently high memory usage value (94% or greater) indicates the host does not have the memory resources required to meet the demand. If the memory balloon and swap values are not high, performance is probably not affected. If the memory usage value is high, and the host has high ballooning or swapping, check the amount of free physical memory on the host. A free memory value of 6% or less indicates that the host requires more memory resources.
The exhibit shows that roll-up type average (minimum/maximum) as problematic. Thus the Host memory is overcommitted.
Incorrect Answers:
A: Guest memory is not the issue here; it is the host memory that is showing swap-in and swap-out rate that is problematic.
C: The I/O operation is not indicating problems.
D: Her I/O operation is not indicating problems.
References:
https://pubs.vmware.com/vsphere-51/index.jsp#com.vmware.vsphere.monitoring.doc/GUID-CD6B417B-F1EC-4698-BE1E-B78B03986EFC.html