The idea that we can take a single physical server and host many VMs has a great deal of value in today's dynamic datacenter environments, but let's face it: there are limits to how many VMs can run on a VMware ESXi host. The key to making the most of your virtualization platform is to understand how key resources —memory, processors, disks, and networks —are consumed by the VMs running on the host and how the host itself consumes resources. The method an ESXi host uses to arbitrate access to each resource is a bit different. This chapter discusses how an ESXi host allocates these resources and how you can change the way these resources are allocated.
In this chapter, you will learn to