diff --git a/bench/main.go b/bench/main.go
index 34bd859..f5793f9 100644
--- a/bench/main.go
+++ b/bench/main.go
@@ -34,13 +34,13 @@ func main() {
 	logger.Infof("starting bench server")
 	config.MustLoadConfig("")
 	logger.InitLog(conf.LogLevel)
-	if busi.BusiConf.Driver != "" {
-		dtmcli.SetCurrentDBType(busi.BusiConf.Driver)
-		svr.PrepareBenchDB()
-	}
 	registry.WaitStoreUp()
 	dtmsvr.PopulateDB(false)
 	if os.Args[1] == "db" {
+		if busi.BusiConf.Driver == "mysql" {
+			dtmcli.SetCurrentDBType(busi.BusiConf.Driver)
+			svr.PrepareBenchDB()
+		}
 		busi.PopulateDB(false)
 	} else if os.Args[1] == "redis" || os.Args[1] == "boltdb" {
 
diff --git a/bench/test-flash-sales.sh b/bench/test-flash-sales.sh
index d47e174..444aeef 100755
--- a/bench/test-flash-sales.sh
+++ b/bench/test-flash-sales.sh
@@ -6,9 +6,8 @@ export LOG_LEVEL=fatal
 export STORE_DRIVER=redis
 export STORE_HOST=localhost
 export STORE_PORT=6379
-go build
 ./bench redis &
 echo 'sleeping 3s for dtm bench to run up.' && sleep 3
 curl "http://127.0.0.1:8083/api/busi_bench/benchFlashSalesReset"
-ab -n 1000 -c 20 "http://127.0.0.1:8083/api/busi_bench/benchFlashSales"
+ab -n 300000 -c 20 "http://127.0.0.1:8083/api/busi_bench/benchFlashSales"
 pkill bench