On Sun, Dec 10, 2017 at 12:27:38 +0100, Tomasz Pala wrote:

> I have found a directory - pam_abl databases, which occupy 10 MB (yes,
> TEN MEGAbytes) and released ...8.7 GB (almost NINE GIGAbytes) after

#  df            
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        64G   61G  2.8G  96% /

#  btrfs fi du .
     Total   Exclusive  Set shared  Filename
     0.00B       0.00B           -  ./1/__db.register
  10.00MiB    10.00MiB           -  ./1/log.0000000001
  16.00KiB       0.00B           -  ./1/hosts.db
  16.00KiB       0.00B           -  ./1/users.db
 168.00KiB       0.00B           -  ./1/__db.001
  40.00KiB       0.00B           -  ./1/__db.002
  44.00KiB       0.00B           -  ./1/__db.003
  10.28MiB    10.00MiB           -  ./1
     0.00B       0.00B           -  ./__db.register
  16.00KiB    16.00KiB           -  ./hosts.db
  16.00KiB    16.00KiB           -  ./users.db
  10.00MiB    10.00MiB           -  ./log.0000000013
     0.00B       0.00B           -  ./__db.001
     0.00B       0.00B           -  ./__db.002
     0.00B       0.00B           -  ./__db.003
  20.31MiB    20.03MiB   284.00KiB  .

#  btrfs fi defragment log.0000000013 
#  df
/dev/sda2        64G   54G  9.4G  86% /


6.6 GB / 10 MB = 660:1 overhead within 1 day of uptime.

-- 
Tomasz Pala <go...@pld-linux.org>
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