Which are two correct descriptions of consumed memory and active memory? (Choose two.)
A.
Consumed memory metric is the amount of memory that the virtual machine has recently used.
B.
Active memory is the exact amount of memory that is currently in use by the virtual machine, plus a 25%
buffer (default setting).
C.
Consumed memory metric is the maximum amount of memory used by the VM at any point in its lifetime.
D.
Active memory is an estimation of the amount of memory that is currently used by the virtual machine, plus
a 25% buffer (default setting).
Explanation:
https://blogs.vmware.com/vsphere/2016/05/load-balancing-vsphere-clusters-with-drs.html
c,d ok
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Correct: C, D
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C + D are correct.
Active vs. Consumed Memory
Have you ever looked at the host utilization for MEM in the vSphere Web Client and wondered why the hosts appear to be imbalanced while DRS says it is balanced? Well, there is a reason for that. The vSphere Web Client is showing consumed memory, while DRS uses active memory when calculating the current host load. This disparity is especially common in environments where VM memory is mostly idle, but the VM once consumed most of its allocation. The consumed memory metric is the maximum amount of memory used by the VM at any point in its lifetime, even if the VM is not actually using most of this memory. By contrast, active memory is an estimation of the amount of memory that is currently actively being used by the VM; it is estimated using a memory sampling algorithm which is run every 5 minutes.
Consumed Memory
The consumed memory metric is not the most accurate way to measure the effectiveness of DRS. To get a better indication of the current host load, one would need to look at the active memory counter for each host to decide if the hosts loads are balanced with one another. Specifically, DRS uses (Active Memory) + (25% of Idle Memory) to determine the value for the current host load.
Source: https://blogs.vmware.com/vsphere/2016/05/load-balancing-vsphere-clusters-with-drs.html
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