Rainer Tammer <pgsql(at)spg(dot)schulergroup(dot)com> writes:
> 2021-08-10 17:15:44 CEST LOG: 00000: received fast shutdown request
> 2021-08-10 17:15:44 CEST LOCATION: pmdie, postmaster.c:2215
> The postmaster simply dies after about 1 hour.
Something is sending the postmaster a SIGINT signal.
regards, tom lane