Gary Webster <webster@lexmark.com> writes:
> By "routine maintenance", do you mean autovacuum, or something else?
> Autovacuum does appear to usually get 'auto-canceled' by a lock.
That's bad and you should look into the reason why it happens. Ordinary
DML (CRUD) operations should not kick autovac off a table. If it's
happening, it's probably because something is fooling with the table's
schema, which doesn't seem like something you want to have happening
during routine operations; especially not on tables that are large
enough for this to be an issue in the first place. Or it might be
something doing a LOCK TABLE as a substitute for more fine-grained
locking; which again is bad for performance reasons that have nothing
to do with hobbling autovacuum.
regards, tom lane
