Joseph Shraibman <jks(at)selectacast(dot)net> writes:
> Why then when I did a kill -INT on the vacuuming backends did everything
> unfreeze?
You could have had other stuff backed up behind the VACUUM FULL lock
requests.
It's not impossible that you had a deadlock *outside* the database,
that is some wait loop that is partially within and partially outside
the DB. But if you want me to believe there's a bug in our deadlock
detector, you're going to have to offer some actual evidence...
regards, tom lane