2009/10/28 Brooks Lyrette <brooks(dot)lyrette(at)gmail(dot)com>:
> There should be no other processes running, this system is dedicated to
> running postgresql.
>
> Max connections is configured to: max_connections = 400
>
Well it sounds like you've somehow run out of swap space. Are you
able to run top and sort by resident memory and also swap memory to
see where it's all going? Also use pg_top if you have it. That will
tell you how much memory each connection is using.
Thom