Re: Vacuum hangs

Patrick Hatcher <PHatcher@macys.com> writes:
> Doing a Vacuum Analyze on a table and it's been hanging for at least 2
> hours.  I could see no other users hitting the table at the time.  This is
> the second time this has happened on this particular table and I can't
> seem to pin point the issue.   If I kill the PID and restart the vacuum
> analyze it works fine.  Any suggestion where I start searching?

Next time, please attach to the vacuuming backend with gdb and get a
stack trace.  The pg_locks output doesn't tell us anything except that
the problem isn't a lock :-(

            regards, tom lane