Remove silent_mode. You get the same functionality with "pg_ctl -l

postmaster.log", or nohup.

There was a small issue with LINUX_OOM_ADJ and silent_mode, namely that with
silent_mode the postmaster process incorrectly used the OOM settings meant
for backend processes. We certainly could've fixed that directly, but since
silent_mode was redundant anyway, we might as well just remove it.

src/backend/utils/misc/guc.c

@@ -824,16 +824,6 @@ static struct config_bool ConfigureNamesBool[] =
 		true,
 		NULL, NULL, NULL
 	},
-	{
-		{"silent_mode", PGC_POSTMASTER, LOGGING_WHERE,
-			gettext_noop("Runs the server silently."),
-			gettext_noop("If this parameter is set, the server will automatically run in the "
-				 "background and any controlling terminals are dissociated.")
-		},
-		&SilentMode,
-		false,
-		NULL, NULL, NULL
-	},
 	{
 		{"log_checkpoints", PGC_SIGHUP, LOGGING_WHAT,
 			gettext_noop("Logs each checkpoint."),

src/backend/utils/misc/postgresql.conf.sample

@@ -300,11 +300,6 @@
 #syslog_facility = 'LOCAL0'
 #syslog_ident = 'postgres'
 
-#silent_mode = off			# Run server silently.
-					# DO NOT USE without syslog or
-					# logging_collector
-					# (change requires restart)
-
 
 # - When to Log -