When I initially setup our VMs, they ran pretty quick. It has now been about a year and performance is not what it used to be. The measurable stuff seems to all be inline. The CPU is not getting hit ...

Virtualization of x86 servers is ubiquitous for obvious reasons. Cost savings, efficiencies in provisioning virtual machines (VMs), recoverability, and the ability to move workloads are a few of them.

While data-center managers have long used heat maps to help determine where to best position racks of servers and cooling units, this mode of visualization can also be handy for better understanding ...