Seems like you're going to have to kill -9.
On Mon, 2 Jan 2006, Gregory S. Williamson wrote:
> I tried
> su - postgres -c '/apps/pgsql-7.4/bin/pg_ctl stop -D /data/postgres/gex_runtime -m immediate'
>
> on one of the two hozed servers and that's (I think) what got this: