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+systemd unit files for PostgreSQL on Debian/Ubuntu
+--------------------------------------------------
+
+Each cluster is run as a separate service, called postgresql@version/name.
+pg_ctlcluster is invoked with --skip-systemctl-redirect. Logging still goes to
+/var/log/postgresql.
+
+There is a parent service called postgresql.service, that starts/stops/restarts/
+reloads all individual services that are configured as "auto" in
+/etc/postgresql/*/*/start.conf.
+
+The link between start.conf and postgresql.service is established by
+postgresql-generator, which creates symlinks in
+/run/systemd/generator/postgresql.service.wants/.
+
+ -- Christoph Berg <myon@debian.org> Fri, 18 Jul 2014 23:52:09 +0300