There seems to be a lot of confusion about this BIOS setting, I receive lots of questions on whether to enable or disable Node interleaving. I guess the term “enable” make people think it some sort of performance enhancement. Unfortunately the opposite is true and it is strongly recommended to keep the default setting and [...]

In part 1 of the series of post on the impact of oversized virtual machines NUMA architecture, memory overhead reservation and share levels are reviewed, part 2 zooms in of the impact of memory overhead reservation and share levels on HA and DRS. Impact of memory overhead reservation on HA Slot size The VMware High [...]

Recently we had an internal discussion about the overhead an oversized virtual machine generates on the virtual infrastructure. An oversized virtual machine is a virtual machine that consistently uses less capacity than its configured capacity. Many organizations follow vendor recommendations and/or provision virtual machine sized according to the wishes of the customer i.e. more resources [...]

Enhanced vMotion Compatibility (EVC) is available for a while now, but it seems to be slowly adopted. Recently VMguru.nl featured an article “Challenge: vCenter, EVC and dvSwitches” which illustrates another case where the customer did not enable EVC when creating the cluster. There seem to be a lot of misunderstanding about EVC and the impact [...]