diff --git a/Documentation/Tutorials/Nagios-Plugins.md b/Documentation/Tutorials/Nagios-Plugins.md
index f3eff0117..4c615e05f 100644
--- a/Documentation/Tutorials/Nagios-Plugins.md
+++ b/Documentation/Tutorials/Nagios-Plugins.md
@@ -92,3 +92,11 @@ Example related to server1.cfg
 * services
 
 	OK: 7 services found | services1=RW_Router;readwritesplit;1;1 services2=RW_Split;readwritesplit;1;1 services3=Test Service;readconnroute;1;1 services4=Master Service;readconnroute;2;2 services5=Debug Service;debugcli;1;1 services6=CLI;cli;2;145 services7=MaxInfo;maxinfo;2;2
+
+Returns OK and the number of services
+
+Returns CRITICAL if no services are found
+
+The data after | char are so called performance data and may be collected by Nagios
+output format is:
+  servicex=Name;router_module;NumUsers;TotalSessions
diff --git a/plugins/nagios/check_maxscale_monitors.pl b/plugins/nagios/check_maxscale_monitors.pl
index b98c5df18..8ab1e0cb2 100755
--- a/plugins/nagios/check_maxscale_monitors.pl
+++ b/plugins/nagios/check_maxscale_monitors.pl
@@ -201,8 +201,8 @@ if ($n_monitors) {
 	close(MAXSCALE);
 	exit 0;
 } else {
-	printf "CRITICAL: 0 monitors found\n";
+	printf "WARNING: 0 monitors found\n";
 	close(MAXSCALE);
-	exit 2;
+	exit 1;
 }