diff --git a/unmaintained/stress_filer_upload/bench_filer_upload/bench_filer_upload.go b/unmaintained/stress_filer_upload/bench_filer_upload/bench_filer_upload.go
index b2e4b28c6..2ee8028f2 100644
--- a/unmaintained/stress_filer_upload/bench_filer_upload/bench_filer_upload.go
+++ b/unmaintained/stress_filer_upload/bench_filer_upload/bench_filer_upload.go
@@ -45,7 +45,7 @@ func main() {
 			defer wg.Done()
 
 			client := &http.Client{Transport: &http.Transport{
-				MaxConnsPerHost:     1024,
+				MaxIdleConns:     1024,
 				MaxIdleConnsPerHost: 1024,
 			}}
 			r := rand.New(rand.NewSource(time.Now().UnixNano() + int64(x)))
diff --git a/weed/operation/upload_content.go b/weed/operation/upload_content.go
index fccc24b16..7e2a6dcd2 100644
--- a/weed/operation/upload_content.go
+++ b/weed/operation/upload_content.go
@@ -58,6 +58,7 @@ var (
 
 func init() {
 	HttpClient = &http.Client{Transport: &http.Transport{
+		MaxIdleConns:        1024,
 		MaxIdleConnsPerHost: 1024,
 	}}
 }
diff --git a/weed/pb/grpc_client_server.go b/weed/pb/grpc_client_server.go
index 9ffda9b04..ec49d177b 100644
--- a/weed/pb/grpc_client_server.go
+++ b/weed/pb/grpc_client_server.go
@@ -29,6 +29,7 @@ var (
 
 func init() {
 	http.DefaultTransport.(*http.Transport).MaxIdleConnsPerHost = 1024
+	http.DefaultTransport.(*http.Transport).MaxIdleConns = 1024
 }
 
 func NewGrpcServer(opts ...grpc.ServerOption) *grpc.Server {
diff --git a/weed/s3api/s3api_object_handlers.go b/weed/s3api/s3api_object_handlers.go
index 4c408110a..82f0de6b2 100644
--- a/weed/s3api/s3api_object_handlers.go
+++ b/weed/s3api/s3api_object_handlers.go
@@ -27,6 +27,7 @@ var (
 
 func init() {
 	client = &http.Client{Transport: &http.Transport{
+		MaxIdleConns:        1024,
 		MaxIdleConnsPerHost: 1024,
 	}}
 }
diff --git a/weed/server/filer_server_handlers_proxy.go b/weed/server/filer_server_handlers_proxy.go
index 8d73bc960..b8b28790b 100644
--- a/weed/server/filer_server_handlers_proxy.go
+++ b/weed/server/filer_server_handlers_proxy.go
@@ -14,6 +14,7 @@ var (
 
 func init() {
 	client = &http.Client{Transport: &http.Transport{
+		MaxIdleConns:        1024,
 		MaxIdleConnsPerHost: 1024,
 	}}
 }
diff --git a/weed/util/http_util.go b/weed/util/http_util.go
index 2cd69b01b..135d10c45 100644
--- a/weed/util/http_util.go
+++ b/weed/util/http_util.go
@@ -21,6 +21,7 @@ var (
 
 func init() {
 	Transport = &http.Transport{
+		MaxIdleConns:        1024,
 		MaxIdleConnsPerHost: 1024,
 	}
 	client = &http.Client{