This module is an add-on for Kohana v3.2.0 that allows you to cache database queries (using the query builder) and to invalidate on a table per table basis. Has the ability to cache by unique user id.
Place into modules/mcache directory
Place the following code in bootstrap.php under Kohana::modules
'mcache' => MODPATH.'mcache' // Memcache query caching for the database