[Bug 1533639] Re: [ubuntu-cpc] please make /tmp a tmpfs in RAM

[Dustin Kirkland ]

** Description changed:

  In Ubuntu, we clear /tmp on every boot.
  
  As such, on servers, by default /tmp should actually be a tmpfs entirely
- in RAM.
+ in RAM, when there is enough memory in the system.  This threshold
+ should be configurable by the end user (in cloud-init?), and default
+ threshold of ~2GB.
  
  This has several advantages, mainly:
   * Performance - much faster read/write access to data in /tmp
   * Security - sensitive data would be cleared from memory on boot, rather than written (leaked) to disk -- important for encryption scenarios
   * Power consumption - storing information in memory is more energy efficient than reading and writing to disk
  
  In scenarios where more space in /tmp is needed than available, one can
  compliment that tmpfs with 'sudo apt-get install swapspace' which will
  dynamically create/delete swapfile as necessary.

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Title:
  [ubuntu-cpc] please make /tmp a tmpfs in RAM

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