[jleahy]

Sounds like vbezhenar cares about being woken up at night by a noisy server, in that case maximum power draw regardless of load is what matters.

[blattimwind]

Why do you expect high load at night?

[MrGilbert]

Backups come to mind. For me, I schedule them at night.

[thedance]

Have a look at the crontabs that ship with Ubuntu.