Re: [PING] fallocate() causes btrfs to never compress postgresql files

Thomas Munro  writes:
> It's slightly tricky to get smgr to behave differently because of the
> contents of a system catalogue!

The mere thought makes me blanch.  I'm okay with the GUC part,
but I do not think we should put in 0002 --- the odds of
causing serious problems greatly outweigh the value, IMO.
Fundamental layering violations tend to bite you on tender
parts of your anatomy.

			regards, tom lane