We just observed some strange frequently occurring CPU ready spikes in our environment (screenshot).
This effect occurred very frequently on each virtual machine. What caused it?
-> The Host Power Management mode which was balanced. After setting it to high-performance the spikes disappeared.
I know this might have to do with the specific hardware we are using, but since I heard about such effects from time to time, think about disabling the power management mode on the ESXi once you observe strange performance symptoms. IMO server are deserving high performance and nothing less 😉
I will change my mind once I have measured the financial benefit that might occur with the balanced power management mode. So if you have any concrete facts and number. Please post it here.