diff --git a/config/config.go b/config/config.go
index ddf6a37937b11..2b6d494e94a99 100644
--- a/config/config.go
+++ b/config/config.go
@@ -404,7 +404,7 @@ var defaultConf = Config{
 		Reporter: OpenTracingReporter{},
 	},
 	TiKVClient: TiKVClient{
-		GrpcConnectionCount:  16,
+		GrpcConnectionCount:  4,
 		GrpcKeepAliveTime:    10,
 		GrpcKeepAliveTimeout: 3,
 		CommitTimeout:        "41s",
diff --git a/config/config.toml.example b/config/config.toml.example
index e98b19e14bcab..6c38768df569f 100644
--- a/config/config.toml.example
+++ b/config/config.toml.example
@@ -259,7 +259,7 @@ local-agent-host-port = ""
 
 [tikv-client]
 # Max gRPC connections that will be established with each tikv-server.
-grpc-connection-count = 16
+grpc-connection-count = 4
 
 # After a duration of this time in seconds if the client doesn't see any activity it pings
 # the server to see if the transport is still alive.