Re: HOT and autovacuum

Alvaro Herrera <alvherre@commandprompt.com> writes:
> I'm seeing a 8.3 database whose autovacuum-initiated vacuums are being
> cancelled and I am not sure of the cause.  I am wondering if a HOT
> cleanup round on a page could try to acquire locks on it that would
> conflict with autovacuum (basically anything that conflicts with a
> vacuum lock).  This would cause autovacuum to commit hara-kiri.

This is nonsense, no?  A buffer cleanup lock is an LWLock not a lock
manager lock.
        regards, tom lane