Reader's Digest Version: Idle for 30 seconds if you must. Longer than that: Turn it off.

读者文摘解答：30秒之内是可以挂空挡的，如果时间比这个长就关掉发动机。

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Currently, the servers found in most data centres continue to slurp energy even when their processors are idle because the server memory cannot be turned off without affecting performance.

现在，大多数据中心的服务器都在时刻“嗡嗡”着，即使它们的进程都是空闲的，这是因为这些服务器内存在没有性能保障时是不能被切断的。

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Since you are charged per deployed instance, you are better off combining as many processes together as possible, especially if the processes are usually idle.

由于你是为每个使用的实例付钱，因此你最好尽可能地组合多个进程，特别是在进程总是空闲的时候。

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But if you do your research, carefully analyze the results, find strengths, identify hurdles and seize upon opportunities, building clusters will aid job creation, re-purpose idle assets, and spark business opportunities that are less susceptible to off-shoring.

FORBES: Making it Work: Cluster what?

Ford Motor (nyse: F - news - people) said today it will idle three auto-production plants because of its Firestone tire recall, taking 6, 000 workers off the production lines.

FORBES: News Scan P.M.