diff --git a/dbpool.go b/dbpool.go
index c9a2fea..67b5671 100644
--- a/dbpool.go
+++ b/dbpool.go
@@ -145,85 +145,41 @@ func (this *dbPool) LoopLoad(
 	doCb func(*DataSet) bool) {
 	newDataCond := sync.NewCond(new(sync.Mutex))
 	chTimer := make(chan int64)
+	go this.discoverNewData(dataSource, watchTable, watchTimeCb, newDataCond)
+	go q5.CreateCondTimer(chTimer, newDataCond)
 
-	go func () {
-		var lastMaxIdx int64
-		for true {
-			hasNewDdata := false
-			this.RawQuery(
-				dataSource,
-				fmt.Sprintf("SELECT MAX(idx) AS max_idx FROM %s", watchTable),
-				[]string{},
-				func (err error, ds *DataSet) {
-					if err != nil {
-						return
-					}
-					if ds.Next() {
-						idx := q5.ToInt64(ds.GetByName("max_idx"))
-						if idx > lastMaxIdx {
-							lastMaxIdx = idx
-							hasNewDdata = true
-							GetSysLog().Info("%s hasNewData max_idx:%d", watchTable, lastMaxIdx)
-						}
-					}
-				})
-			if hasNewDdata {
-				newDataCond.Broadcast()
-			} else {
-				time.Sleep(time.Second * time.Duration(watchTimeCb()))
-			}
-		}
-	}()
-
-	go func () {
-		var waitSecond int64 = 10
-		for {
-			select {
-			case waitSecond = <-chTimer:
-				if waitSecond < 10 {
-					waitSecond = 10
+	var lastIdx int64
+	for true {
+		hasNextData := false
+		sql := sqlCb(lastIdx)
+		this.RawQuery(
+			dataSource,
+			sql,
+			params,
+			func (err error, ds *DataSet) {
+				if err != nil {
+					return
 				}
-			case <-time.After(time.Second * time.Duration(waitSecond)):
-				waitSecond = 10
-				newDataCond.Broadcast()
-			}
-		}
-	}()
-
-	{
-		var lastIdx int64
-		for true {
-			hasNextData := false
-			sql := sqlCb(lastIdx)
-			this.RawQuery(
-				dataSource,
-				sql,
-				params,
-				func (err error, ds *DataSet) {
-					if err != nil {
+				for ds.Next() {
+					idx := q5.ToInt64(ds.GetByName("idx"))
+					if !doCb(ds) {
 						return
 					}
-					for ds.Next() {
-						idx := q5.ToInt64(ds.GetByName("idx"))
-						if !doCb(ds) {
-							return
-						}
-						if idx > lastIdx {
-							lastIdx = idx
-						}
-						hasNextData = true
+					if idx > lastIdx {
+						lastIdx = idx
 					}
-				})
-			if hasNextData {
-				chTimer <- nextTimeCb()
-			} else {
-				lastIdx = 0
-				chTimer <- nextRoundCb()
-			}
-			newDataCond.L.Lock()
-			newDataCond.Wait()
-			newDataCond.L.Unlock()
+					hasNextData = true
+				}
+			})
+		if hasNextData {
+			chTimer <- nextTimeCb()
+		} else {
+			lastIdx = 0
+			chTimer <- nextRoundCb()
 		}
+		newDataCond.L.Lock()
+		newDataCond.Wait()
+		newDataCond.L.Unlock()
 	}
 }
 
@@ -699,3 +655,33 @@ func (this *dbPool) queryOne(dataSource string, sql string, params []string,
 		go this.internalQueryOne(dataSource, sql, params, cb)
 	}
 }
+
+func (this *dbPool ) discoverNewData(dataSource string, watchTable string, watchTimeCb func() int64,
+	cond *sync.Cond) {
+	var lastMaxIdx int64
+	for true {
+		hasNewDdata := false
+		this.RawQuery(
+			dataSource,
+			fmt.Sprintf("SELECT MAX(idx) AS max_idx FROM %s", watchTable),
+			[]string{},
+			func (err error, ds *DataSet) {
+				if err != nil {
+					return
+				}
+				if ds.Next() {
+					idx := q5.ToInt64(ds.GetByName("max_idx"))
+					if idx > lastMaxIdx {
+						lastMaxIdx = idx
+						hasNewDdata = true
+						GetSysLog().Info("%s hasNewData max_idx:%d", watchTable, lastMaxIdx)
+					}
+				}
+			})
+		if hasNewDdata {
+			cond.Broadcast()
+		} else {
+			time.Sleep(time.Second * time.Duration(watchTimeCb()))
+		}
+	}
+}