Metric for stats elapsed time

handlers.go

@@ -430,6 +430,10 @@ func metricsHandler(c echo.Context) error {
 	metrics += fmt.Sprintf("rosti_node_memory_index{hostname=\"%s\"} %f\n", hostname, node.MemoryIndex)
 	metrics += fmt.Sprintf("rosti_node_sold_memory{hostname=\"%s\"} %d\n", hostname, node.SoldMemory)
 
+	if elapsedMetric != -1 {
+		metrics += fmt.Sprintf("rosti_node_stats_time_elapsed{hostname=\"%s\"} %d\n", hostname, elapsedMetric)
+	}
+
 	apps, err := processor.List(true)
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)

main.go

@@ -22,6 +22,8 @@ var nc *nats.Conn
 var snapshotProcessor apps.SnapshotProcessor
 var nodeProcessor node.Processor
 
+var elapsedMetric int // time elapsed while loading stats about apps
+
 func _init() {
 	var err error
 
@@ -58,6 +60,9 @@ func _init() {
 	nodeProcessor = node.Processor{
 		DB: common.GetDBConnection(),
 	}
+
+	// Reset elapsed stats
+	elapsedMetric = -1
 }
 
 func main() {
@@ -89,6 +94,7 @@ func main() {
 				log.Println("LOOP ERROR:", err.Error())
 			}
 			elapsed := time.Since(start)
+			elapsedMetric = int(elapsed)
 			log.Printf("Stats gathering elapsed time: %.2fs\n", elapsed.Seconds())
 			time.Sleep(300 * time.Second)
 		}