EllisLab/CodeIgniter — pull request #2897 by rawoke083 (2014-02-21 10:07:24+00:00)
Title: Added option to memcached db queries. Also falls back to file caching

This will use memcached to cache queries.
Can also fallback to file cache.

To enable:
../config/database.php
$db['foobar']['cache_mc']=TRUE;
$db['foobar']['cache_mc_time_sec']=10;