Robert Haas <robertmhaas@gmail.com> writes:
> I really hate this solution, because writing out data that we're about
> to throw away just in case we can't actually throw it away seems like
> a real waste from a performance standpoint.
We went around on this already in the pgsql-bugs thread. I don't much
like it either, but there isn't any better solution that seems safe
enough to back-patch.
> Could we avoid this
> altogether by allocating a new relfilenode on truncate?
Then we'd have to copy all the data we *didn't* truncate, which is
hardly likely to be a win.
regards, tom lane
