Buffers, like HA, remove a percentage of total capacity to help define the usable capacity value which is used for analysis. An important point to be aware of is that buffers are applied to total capacity after the HA buffer is taken into account.
Although most administrators would simply set both CPU and memory buffers at 10%, for example, it is important to understand that buffers need to be set accordingly for your model (demand or allocation), and, more importantly, based on your workload types.
When using the demand model, for example, buffers become critical, ensuring sub-hour peaks can be handled that are too short to affect stress and therefore the demand calculation. It is recommended that, in conservative mission critical ...
