Launch self-monitoring in a go-routine

server.go

@@ -331,6 +331,7 @@ func (s *Server) StartSelfMonitoring(database, retention string, interval time.D
 	// Grab the initial stats.
 	prev := s.stats.Snapshot()
 
+	go func() {
 		for {
 			time.Sleep(interval)
 
@@ -352,6 +353,9 @@ func (s *Server) StartSelfMonitoring(database, retention string, interval time.D
 			// Save stats for the next loop.
 			prev = stats
 		}
+	}()
+
+	return nil
 }
 
 // StartRetentionPolicyEnforcement launches retention policy enforcement.