Host Power Management in VMware vSphere 5
vSphere Host Power Management (HPM) is a technique that saves energy by placing certain parts of a computer system or device into a reduced power state when the system or device is inactive or does not need to run at maximum speed. This paper evaluates the power savings achieved with HPM on a test system when using a microbenchmark that simulates application loads running at different levels. In addition, this paper recommends power management BIOS settings that work best with HPM. It defines the different levels of power policies and describes the esxtop power screen. It concludes with some best practices to use for HPM.