Re: Oddly slow read performance with near-full largish FS

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Robert White <rwhite@xxxxxxxxx> wrote:
> 
> You have very little free memory.

I think you're mistaken.  Every diagnostic I've looked at says the opposite.
>From 30 seconds ago on the same machine, after unmounting the big btrfs
filesystem (and with a larger xfs one mounted), /proc/meminfo says almost the
entirety of the machine's 16GB is free:

  MemTotal:       16469880 kB
  MemFree:        16005392 kB
  MemAvailable:   15974244 kB
  Buffers:              84 kB
  [...]

> This is called "demand paging",

Yes, I'm aware of how this works.

Charles
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Charles Cazabon
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