diff --git a/src/server/cluster/Cluster.go b/src/server/cluster/Cluster.go
index 400125eb..e6a12c53 100644
--- a/src/server/cluster/Cluster.go
+++ b/src/server/cluster/Cluster.go
@@ -30,7 +30,7 @@ func Init() {
 		server = new(network.TCPServer)
 		server.Addr = conf.Server.ListenAddr
 		server.MaxConnNum = int(math.MaxInt32)
-		server.PendingWriteNum = 1 << 20
+		server.PendingWriteNum = 1 << 14
 		server.LenMsgLen = 4
 		server.MaxMsgLen = 4096
 		server.NewAgent = newServerAgent
diff --git a/src/server/cluster/cluster_func.go b/src/server/cluster/cluster_func.go
index fdba8540..d02bdce9 100644
--- a/src/server/cluster/cluster_func.go
+++ b/src/server/cluster/cluster_func.go
@@ -91,7 +91,7 @@ func connectRemote(RemoteAddr string, ConnType int, ConnLabel string) error {
 	client := new(network.TCPClient)
 	client.Addr = RemoteAddr
 	client.ConnNum = 1
-	client.PendingWriteNum = 1 << 20
+	client.PendingWriteNum = 1 << 14
 	client.LenMsgLen = 4
 	client.MaxMsgLen = 4096
 	client.NewAgent = newAgent