[Bug 1032322] Re: Swap space allocation for large memory systems needs improvement

Dmitrijs Ledkovs launchpad at surgut.co.uk
Fri Sep 14 15:07:20 UTC 2012

** No longer affects: partman-auto (Ubuntu Quantal)

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  Swap space allocation for large memory systems needs improvement

Status in “partman-auto” package in Ubuntu:
Status in “partman-auto” source package in Precise:

Bug description:
  The recipe used for automatic swap space allocation during install
  this is:

  100% 512 200% linux-swap
          $lvmok{ }
          $reusemethod{ }
          method{ swap }
          format{ } .

  Where we currently allocate a minimum of 100% of swap (maximum 200%).
  The original justification for this is that you need 100% of your
  memory to guarantee hibernate works (bug #311299).    However, for
  servers, we don't hibernate and often have large amounts of memory
  installed, i.e. 100's of GB or even TBs, and such a method wastes a
  lot of disk space.

  I propose we do at least 100% (probably a bit more) for machines up to
  a certain level of memory (4GB or less.../maybe/ up to 8GB), to ensure
  client machines can hibernate.  However after that, we set some sort
  of sliding scale approach that maxes out at a reasonable amount for
  servers.  Experienced users can always override the settings if they

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