On Tue, Mar 03, 2015 at 10:09:41AM +0200, Johann Spies wrote: > > > I can run du, but that takes ages, and has a performance impact. df > only gives the total for the filesystem, of course. > > Try ncdu. It also takes some time to finish calculating, but the output > is easier to handle and you can drill down to lower directories without > losing the other data. Also, if it's useful to you, you can separate out the gathering and displaying tasks with ncdu. So you could, for example, run "ionice -c3 ncdu -o ~/ncdu-output" late at night (or when the system is relatively quiet) and then, in the morning run "ncdu -f ~/ncdu-output" to examine the file that was produced by the overnight run.
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