pgsql-bugs(at)postgresql(dot)org writes:
> postmaster crashes every time a user tries to access database from psql
Does it fail for all users, or just some? Did it used to work and is
now failing, or is this a new installation that's never worked?
What shows up in the postmaster log when this happens? (If you're not
running with a postmaster log, reconsider that.) Is there a core file
left behind, and if so what does gdb show for the backtrace?
regards, tom lane