Fast. Very fast. That’s what we had in mind when we designed PoliGraf. When you need vSphere metrics, the obvious way is the PerformanceManager, but we need something faster so we choosed managed object properties and quickstats like ResourcePoolQuickStats. If we have no other choice, we failback to the PerformanceManager but we only query the last 15 samples of the RealTime samplingPeriod since we pull vSphere metrics every 5 minutes.