Tinker with defaults to increase throughput

tools/load_tester.cpp

@@ -124,9 +124,9 @@ int getConnectFdUnix(const char *socket_name) {
 
 struct Config {
   int concurrency = 64;
-  int requests_per_connection = 1;
-  int connect_threads = 4;
-  int network_threads = 4;
+  int requests_per_connection = 50;
+  int connect_threads = 1;
+  int network_threads = 5;
   int event_batch_size = 32;
   int connection_buf_size = 1024;
   std::string host = "";