"Mikael Carneholm" <Mikael.Carneholm@WirelessCar.com> writes:
> Don't know if this is a bug or just undocumented, but it seems as you should turn off autovacuum before you run
CLUSTER,otherwise you might run into a deadlock:
Which variant of CLUSTER were you using? ISTR that some of them lock
the index before the table, which is prone to deadlock against nearly
all other operations on the table (not just vacuum).
regards, tom lane