Thread:

From
Rick Gigger
Date:
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?

Re:

From
Tom Lane
Date:
Rick Gigger <rick@alpinenetworking.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