Disable performance-schema (#3589)

toolset/databases/mysql/my.cnf

@@ -42,6 +42,12 @@ table_definition_cache  = 800
 max_heap_table_size     = 128M
 tmp_table_size          = 128M
 
+#
+# monitoring off
+#
+
+performance-schema = false
+
 #
 # innodb settings
 #