Robert Haas <robertmhaas@gmail.com> writes:
> ... I guess you could incur the overhead repeatedly if the relation starts
> out at 1 block, grows to 4, is vacuumed back down to 1, lather, rinse,
> repeat, but is that actually realistic?
While I've not studied the patch, I assumed that once a relation has an
FSM it won't disappear. Making it go away again if the relation gets
shorter seems both fairly useless and a promising source of bugs.
regards, tom lane