cache.php memcache

I searched from google for gallery3 cache.php examples for modules/gallery/config/ and found only example for file backend driver (https://github.com/gallery/gallery3/blob/master/system/config/cache.php). Database example is already in original file. But I cannot find documentation about memcache driver. If I leave all lines to default and change only driver line from database to memcache I will get an error. Does anyone have a hint about this? I think I will need to change params line: params - Driver parameters, specific to each driver.