Re: Slow on heavy I/O operations.

But what I can't understand - why such non-critical(as it seems to me)
disk activity, cause 100% busyness for disk?

Others have pointed out the effect of seeking.

It would be very useful if there was a way to nice I/O up or down
the way we can nice CPU usage up or down. Then non-critical
disk activity could be niced down and not impact critical I/O
so much.
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