18 : _market_handler(market_handler),
19 _auxiliary_memory_manager(),
20 _level_memory_manager(_auxiliary_memory_manager),
21 _level_pool(_level_memory_manager),
22 _symbol_memory_manager(_auxiliary_memory_manager),
23 _symbol_pool(_symbol_memory_manager),
24 _order_book_memory_manager(_auxiliary_memory_manager),
25 _order_book_pool(_order_book_memory_manager),
26 _order_memory_manager(_auxiliary_memory_manager),
27 _order_pool(_order_memory_manager),