Postgres 9.2.13 on AIX 7.1

Hello,
I know that this is an older version, but maybe someone has a hint.
I can unfortunately currently not upgrade this instance to a higher
version because of some restrictions in other applications.

postgresql-9.2.13

2021-08-10 16:24:50 CEST [local] postgresSTATEMENT:  SELECT 'tele_shd_id_max'::pg_catalog.regproc::pg_catalog.oid  (no problen, caused by upgrade an missing table)
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
2021-08-10 17:15:44 CEST  LOG:  00000: aborting any active transactions
2021-08-10 17:15:44 CEST  LOCATION:  pmdie, postmaster.c:2239
2021-08-10 17:15:44 CEST  LOG:  00000: autovacuum launcher shutting down
2021-08-10 17:15:44 CEST  LOCATION:  AutoVacLauncherMain, autovacuum.c:779
2021-08-10 17:15:44 CEST  LOG:  00000: shutting down
2021-08-10 17:15:44 CEST  LOCATION:  ShutdownXLOG, xlog.c:7957
2021-08-10 17:15:44 CEST  LOG:  00000: database system is shut down
2021-08-10 17:15:44 CEST  LOCATION:  ShutdownXLOG, xlog.c:7979


OS: AIX 7.1 TL5 SP8

It looks line 8.4.22 is running without crashing.

The postmaster simply dies after about 1 hour.

Bye
  Rainer Tammer