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Re: Energy consumption vs % utilization?
- From: Petri Helenius
- Date: Tue Oct 26 16:22:38 2004
Alex Rubenstein wrote:
You should be able to pick up simple current / wattage meter from local
hardware store for $20 or so. That will tell you that on a modern
dual-CPU machine the power consumption at idle CPU is about 60% of peak.
The rest is consumed by drives, fans, RAM, etc. As wattage the
difference is 100-120W (50-60W per cpu)
I'm looking for information on energy consumption vs percent
utilization. In other words if your datacenter consumes 720 MWh per
month, yet on average your servers are 98% underutilized, you are
wasting a lot of energy (a hot topic these days). Does anyone here
have any real data on this?
I've never done a study on power used vs. CPU utilization, but my
guess is that the heat generated from a PC remains fairly constant --
in the grand scheme of things -- no matter what your utilization is.
All modern operating systems do moderate job of saving CPU wattage when
they are idle (BSD's, Linux, MACOS X, WinXP, etc.)