Re:

Rick Gigger <rick(at)alpinenetworking(dot)com> writes:
> Every once in a while I've noticed the number of processes I've got
> running jumps up a little higher than normal. So I check it out and
> realize that I'm building up a bunch of processes that just aren't
> completing. About half of the one's not completing say "SELECT
> waiting". I'm not doing anything that I am aware of that could be
> blocking anything. I am only doing regular vacuums. I am not
> explicitly locking anything that I know of. Is there a way to figure
> out what each of these processes are waiting on?

Look at the pg_locks view to see what locks they are waiting for and
who's got conflicting locks.

regards, tom lane