In the "redesign checkpoint_segments" patch, Robert suggested keeping
the settings' base unit as "number of segments", but allow conversions
from MB, GB etc. I started looking into that and found that adding a new
unit to guc.c is quite messy. The conversions are done with complicated
if-switch-case constructs.
Attached is a patch to refactor that, making the conversions
table-driven. This doesn't change functionality, it just makes the code
nicer.
Any objections?
- Heikki
