diff --git a/features/mml/mml.go b/features/mml/mml.go
index 841b7fa9..f013df75 100644
--- a/features/mml/mml.go
+++ b/features/mml/mml.go
@@ -72,7 +72,7 @@ func PostMMLToNF(w http.ResponseWriter, r *http.Request) {
 	log.Debugf("token:%s, method:%s, managementType:%s dbname:%s, tbname:%s pack:%s",
 		token, r.Method, module, neType, neId[0], pack)
 
-	var buf [8192]byte
+	var buf [20 * 1024]byte
 	var n int
 	var mmlResult []string