diff --git a/cmd/ledis-dbbench/main.go b/cmd/ledis-dbbench/main.go
index b2183ce..0ab8277 100644
--- a/cmd/ledis-dbbench/main.go
+++ b/cmd/ledis-dbbench/main.go
@@ -58,9 +58,10 @@ func bench(cmd string, f func()) {
 var kvSetBase int64 = 0
 var kvGetBase int64 = 0
 
+var value []byte
+
 func benchSet() {
 	f := func() {
-		value := make([]byte, *valueSize)
 		n := atomic.AddInt64(&kvSetBase, 1)
 
 		db.Set(num.Int64ToBytes(n), value)
@@ -122,6 +123,8 @@ func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 	flag.Parse()
 
+	value = make([]byte, *valueSize)
+
 	cfg := config.NewConfigDefault()
 	cfg.DataDir = "./var/ledis_dbbench"
 	cfg.DBName = *name