"Chad N. Tindel" <chad@tindel.net> writes:
> LOG: received fast shutdown request
> LOG: aborting any active transactions
> FATAL: terminating connection due to administrator command
> However, nobody issued a "fast shutdown request".
*Something* sent the postmaster a SIGINT. You need to figure out what.
I'd wonder about "ulimit" or other resource-consumption limits.
regards, tom lane