DB::Pool::Stats

new(open_connections : Int32, idle_connections : Int32, in_flight_connections : Int32, max_connections : Int32)

copy_with(open_connections _open_connections = @open_connections, idle_connections _idle_connections = @idle_connections, in_flight_connections _in_flight_connections = @in_flight_connections, max_connections _max_connections = @max_connections)