Memory demand is often the least understood metric in vRealize Operations, and as such it causes a great deal of confusion and often leads to incorrect capacity management data. Memory demand, like CPU demand, is derived from a variety of metrics to easily show the administrator how much memory a virtual machine requires or is asking for.
The difference between CPU and memory demand is that CPU demand is based on CPU usage, which is a very accurate metric that vSphere is easily able to record. Memory demand, on the other hand, is primarily based on the metric's Active Memory.
Active Memory is defined as the "amount of memory that is actively used, as estimated by VMkernel based on recently touched memory pages." This concept ...
