diff --git a/app/main.go b/app/main.go
index 8a5ec67..2e5a0b8 100644
--- a/app/main.go
+++ b/app/main.go
@@ -19,16 +19,17 @@ func wait() {
 }
 
 func main() {
-	if len(os.Args) > 1 && os.Args[1] == "dtmsvr" { // 实际运行，只启动dtmsvr，不重新load数据
-		dtmsvr.MainStart()
-		wait()
-	}
-	// 下面都是运行示例，因此首先把服务器的数据重新准备好
-	dtmsvr.PopulateMysql(true)
-	dtmsvr.MainStart()
-	if len(os.Args) == 1 { // 默认没有参数的情况下，准备好数据并启动dtmsvr即可
+	onlyServer := len(os.Args) > 1 && os.Args[1] == "dtmsvr"
+	if !onlyServer { // 实际线上运行，只启动dtmsvr，不准备table相关的数据
+		dtmsvr.PopulateMysql(true)
+	}
+	dtmsvr.StartSvr()              // 启动dtmsvr的api服务
+	go dtmsvr.CronExpiredTrans(-1) // 启动dtmsvr的定时过期查询
+
+	if onlyServer || len(os.Args) == 1 { // 没有参数，或者参数为dtmsvr，则不运行例子
 		wait()
 	}
+
 	// quick_start 比较独立，单独作为一个例子运行，方便新人上手
 	if len(os.Args) > 1 && (os.Args[1] == "quick_start" || os.Args[1] == "qs") {
 		examples.QsStartSvr()
diff --git a/dtmsvr/cron.go b/dtmsvr/cron.go
index 4318102..3b18ce9 100644
--- a/dtmsvr/cron.go
+++ b/dtmsvr/cron.go
@@ -26,8 +26,8 @@ func CronTransOnce(expireIn time.Duration) bool {
 // CronExpiredTrans cron expired trans, num == -1 indicate for ever
 func CronExpiredTrans(num int) {
 	for i := 0; i < num || num == -1; i++ {
-		notEmpty := CronTransOnce(time.Duration(0))
-		if !notEmpty {
+		hasTrans := CronTransOnce(time.Duration(0))
+		if !hasTrans && num != 1 {
 			sleepCronTime()
 		}
 	}
@@ -60,5 +60,6 @@ func handlePanic() {
 func sleepCronTime() {
 	delta := math.Min(3, float64(config.TransCronInterval))
 	interval := time.Duration((float64(config.TransCronInterval) - rand.Float64()*delta) * float64(time.Second))
+	logrus.Printf("sleeping for %v", interval)
 	time.Sleep(interval)
 }
diff --git a/dtmsvr/dtmsvr_test.go b/dtmsvr/dtmsvr_test.go
index 26da56c..a5d569b 100644
--- a/dtmsvr/dtmsvr_test.go
+++ b/dtmsvr/dtmsvr_test.go
@@ -41,8 +41,10 @@ func TestCover(t *testing.T) {
 	db := dbGet()
 	db.NoMust()
 	CronTransOnce(0)
-	defer handlePanic()
-	checkAffected(db.DB)
+	err := common.CatchP(func() {
+		checkAffected(db.DB)
+	})
+	assert.Error(t, err)
 
 	CronExpiredTrans(1)
 	go sleepCronTime()
diff --git a/dtmsvr/main.go b/dtmsvr/main.go
index 685096f..1aefe42 100644
--- a/dtmsvr/main.go
+++ b/dtmsvr/main.go
@@ -11,12 +11,6 @@ import (
 
 var dtmsvrPort = 8080
 
-// MainStart main
-func MainStart() {
-	StartSvr()
-	go CronExpiredTrans(-1)
-}
-
 // StartSvr StartSvr
 func StartSvr() {
 	logrus.Printf("start dtmsvr")