CI_Cache Object
(
    [valid_drivers:protected] => Array
        (
            [0] => cache_apc
            [1] => cache_file
            [2] => cache_memcached
            [3] => cache_dummy
        )

    [_cache_path:protected] => 
    [_adapter:protected] => memcached
    [_backup_driver:protected] => file
    [lib_name:protected] => 
)
bool(true)
121cbh_mc_stockData_600000Array
(
    [expire] => 1539692509
    [mtime] => 1539691909
    [data] => 21cbh_mc_stockData_600000
)