diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index 4465c876b18..62cec614d37 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1448,7 +1448,7 @@ export PG_OOM_ADJUST_VALUE=0
     server must be shut down to view this runtime-computed parameter.
     This might look like:
 <programlisting>
-$ <userinput>postgres -D $PGDATA -C shared_memory_size_in_huge_pages 2> /dev/null</userinput>
+$ <userinput>postgres -D $PGDATA -C shared_memory_size_in_huge_pages</userinput>
 3170
 $ <userinput>grep ^Hugepagesize /proc/meminfo</userinput>
 Hugepagesize:       2048 kB
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index ce4007bb2c7..8e61b3471ca 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -913,6 +913,16 @@ PostmasterMain(int argc, char *argv[])
 			puts(config_val ? config_val : "");
 			ExitPostmaster(0);
 		}
+
+		/*
+		 * A runtime-computed GUC will be printed later on.  As we initialize
+		 * a server startup sequence, silence any log messages that may show
+		 * up in the output generated.  FATAL and more severe messages are
+		 * useful to show, even if one would only expect at least PANIC.  LOG
+		 * entries are hidden.
+		 */
+		SetConfigOption("log_min_messages", "FATAL", PGC_INTERNAL,
+						PGC_S_OVERRIDE);
 	}
 
 	/* Verify that DataDir looks reasonable */