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When I do ps -ef, I see "TIME" field. What does this field mean? From what I understand, this tells the actual CPU time, that the process got (amidst all the context switching). Does the TIME field include the disk read/write time also or only the CPU time?

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-1, man ps, /time, first result. –  l0b0 Apr 12 '12 at 14:04

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It's the execution time - the time the process actually used the CPU(s), this does not count in the time the process waits for I/O events.

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