The Hermit Hacker <scrappy@hub.org> writes:
> This RC *requires* a complete dump/initdb/reload of your database
> ... without it, consider your database a ticking timebomb ...
Or at least your pg_group table is a timebomb, if it's not empty.
Panic is not called for unless you use groups.
It should be noted that we found and fixed some problems in pg_upgrade
as well. This may mean that pg_upgrade is now safe. Or not, but it's
hard to say without testing. I would like to ask people who are
upgrading to RC5 to try to use pg_upgrade for the move, and report
whether you see problems or not. *Please* read the man page for
pg_upgrade, and make a complete dump beforehand so you have a fallback
if it fails ...
regards, tom lane