Added missing already defined metric to map and added new one

include/MySQL_HostGroups_Manager.h

@@ -291,6 +291,7 @@ struct p_hg_counter {
 		access_denied_max_user_connections,
 		myhgm_myconnpool_get,
 		myhgm_myconnpool_get_ok,
+		myhgm_myconnpool_get_ping,
 		myhgm_myconnpool_push,
 		myhgm_myconnpool_reset,
 		myhgm_myconnpool_destroy,

lib/MySQL_HostGroups_Manager.cpp

@@ -1083,6 +1083,12 @@ hg_metrics_map = std::make_tuple(
 			"Total queries backend INIT DB.",
 			metric_tags {}
 		),
+		std::make_tuple (
+			p_hg_counter::com_backend_set_names,
+			"proxysql_com_backend_set_names",
+			"Total queries backend SET NAMES.",
+			metric_tags {}
+		),
 		std::make_tuple (
 			p_hg_counter::com_frontend_init_db,
 			"proxysql_com_frontend_init_db",
@@ -1149,6 +1155,12 @@ hg_metrics_map = std::make_tuple(
 			"The number of successful requests to the connection pool (i.e. where a connection was available).",
 			metric_tags {}
 		),
+		std::make_tuple (
+			p_hg_counter::myhgm_myconnpool_get_ping,
+			"proxysql_myhgm_myconnpool_get_ping",
+			"The number of connections that were taken from the pool to run a ping to keep them alive.",
+			metric_tags {}
+		),
 		std::make_tuple (
 			p_hg_counter::myhgm_myconnpool_push,
 			"proxysql_myhgm_myconnpool_push",