diff --git a/uid.go b/uid.go
index a7be50b..5a37361 100644
--- a/uid.go
+++ b/uid.go
@@ -100,8 +100,8 @@ func (idg *idCreator) backgroudTaskForGenerateRange() {
 
 	// doing range generator
 	for i := 0; ; i++ {
+		logStr := ""
 		log.SetLogid(fmt.Sprintf("uidcreator%07d", i))
-		log.PrintPretty("backgroud info, ranges:", idg.Ranges)
 		for prefix, queue := range idg.Ranges {
 			var qlen = queue.Len()
 			var timeoutMs = 1 * time.Millisecond
@@ -120,6 +120,12 @@ func (idg *idCreator) backgroudTaskForGenerateRange() {
 			} else if int(timeoutMs) < 0 {
 				time.Sleep(-timeoutMs)
 			}
+			if i%50 == 0 {
+				logStr += fmt.Sprintf("queue-legth:(%s,%d);", prefix, queue.Len())
+			}
+		}
+		if i%50 == 0 {
+			log.Infof("backgroud idcreator info: %s", logStr)
 		}
 		time.Sleep(3000 * time.Millisecond)
 	}