On 2010-11-12 15:56, Simon King wrote:
> Hi!
> 
> On certain machines, I encounter the problem that the wall time for my
> computations is *much* more than the CPU time. For example, on one
> machine, the CPU time is 60 minutes, but the wall time is 330 minutes.
> On a different machine, the CPU time is 13 minutes but the wall time
> 19 minutes.

Forgive me for stating the obvious, but it might be caused by
1) swapping out memory to disk
2) other processes taking up CPU time

Jeroen.

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