diff --git a/transport/ray/direct.go b/transport/ray/direct.go
index 50da6a0f5..25495143f 100644
--- a/transport/ray/direct.go
+++ b/transport/ray/direct.go
@@ -5,7 +5,7 @@ import (
 )
 
 const (
-	bufferSize = 16
+	bufferSize = 128
 )
 
 // NewRay creates a new Ray for direct traffic transport.