diff --git a/uid.go b/uid.go
index db7c727..097edcd 100644
--- a/uid.go
+++ b/uid.go
@@ -43,7 +43,7 @@ type Range struct {
 	Length int    // lenght of this range
 }
 type rangeQueue struct {
-	deque.Deque[*Range]
+	//deque.Deque[*Range]
 }
 
 const (
@@ -78,7 +78,8 @@ func NewIdCreator(typ string, helper IdCreatorHelper) IdCreator {
 
 	// Step 3. backgroud task for generate range
 	go func() {
-		for {
+		for i := 0; ; i++ {
+			log.SetLogid(fmt.Sprintf("uidcreator%07d", i))
 			for prefix, queue := range idg.Ranges {
 				var qlen = queue.Len()
 				var timeoutMs = 1 * time.Millisecond
@@ -98,7 +99,7 @@ func NewIdCreator(typ string, helper IdCreatorHelper) IdCreator {
 					time.Sleep((-timeoutMs) * time.Millisecond)
 				}
 			}
-			time.Sleep(1000 * time.Millisecond)
+			time.Sleep(3000 * time.Millisecond)
 		}
 	}()