Green Performance Monitoring

Google uses standard data center efficiency metric to monitor performance, identify opportunities for improvement, and track the impact of its actions. The trends are impressive and efficiency gains drop straight to their bottom line. ...

... "We achieve this result without the use of any exotic techniques the EPA report assumes are necessary to reach this level of efficiency. Individual facilities can return even lower PUE values, with at least one facility returning a TTM PUE of 1.15. Our lowest published quarterly average PUE of an individual facility is 1.12, meaning that all electrical losses and cooling overhead combined used just 12% of the IT load. We believe that each of these data centers ranks among the most efficient large data centers currently in operation today. " ...

Via Google : Green Data Center Trends