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** Changed in: procps (Debian)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/126329

Title:
  "free" doesn't account for slab cache

Status in “procps” package in Ubuntu:
  Confirmed
Status in “procps” package in Debian:
  Fix Released

Bug description:
  Binary package hint: procps

  Using procps 1:3.2.7-3ubuntu2 from Feisty, do "free -m":

               total       used       free     shared    buffers     cached
  Mem:          2026       1967         59          0        629        665
  -/+ buffers/cache:        672       1354
  Swap:            0          0          0

  Historically I've used the "-/+ buffers/cache" line as a way to
  determine how much memory my system is "really" using.  "Really" in
  this case means "memory in use that won't just be freed up when I want
  it for something".

  Since the "-/+ buffers/cache" line doesn't include the Slab cache (the
  "Slab:" line in /proc/meminfo), and the Slab cache can grow quite big,
  "free" cannot be used to determine the amount of free memory in the
  machine :-(.

  I would like "free" to count the Slab: memory as free, at least on the
  "-/+ buffers/cache" line.

  Or that somebody could tell me an alternative way of finding out the
  amount of free memory in my machine without having to manually add
  things up from /proc/meminfo.

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