There seems to be a misconception on the part of the devs that allowing
too much swap will result in machines under memory pressure suffering
worse than if they simply ran out of memory and the kernel's OOM killer
rescued the system.  Running out of memory is almost *never* better than
hitting swap.  Depending on the application, it is possible to swap out
vast swaths of system memory to make room for temporary spikes in memory
allocation. It is also customary for the kernel to swap out about 1GB of
memory that will most likely never be accessed again after boot.   This
cannot be done when the max swap is 1GB.  Factor in fast SSD's and
VNME's that come much closer to the performance of RAM, and a system can
remain quite usable even if it should develop a swap storm.  The bottom
line is that this should be a user-tunable in the installer and not
something users have to resort to swapfiles to work around.

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https://bugs.launchpad.net/bugs/1767299

Title:
  Ubuntu 18.04 Installer creates swap partition too small

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