=?iso-8859-1?Q?Hans=2DJ=FCrgen=20Sch=F6nig?= <hs@cybertec.at> writes:
> kshopd@a:~/backup > psql tempdata
> psql: pqReadData() -- backend closed the channel unexpectedly.
> This probably means the backend terminated abnormally
> before or while processing the request.
Hm. This looks rather like a backend coredump :-(. What shows up
in the postmaster log? (If you don't have one, now's a good time
to start.) If a core file appears in the database subdirectory,
can you get a debugger backtrace from it?
regards, tom lane