On Thu, Oct 8, 2009 at 11:55 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> I wouldn't be too surprised if the LOCK is coming from some Slony
> operation or other. You might want to ask the slony hackers about it.
I've had issues like this. Shutting down the slon daemons before
running such commands would usually allow them to finish, at the cost
of replication falling behind while it runs.