I have several queries that leverage storing data in memcached.  Does it makes and is it against best practices to run a cron job to run these queries say every 15 minutes to keep the cache updated?  Currently our cache expires every 30 minutes, and refreshes if someone comes to visit a page that executes the query and stores it in cache. Was wondering what others thought about this approach.
Memcache queries run on a cron job?
memcached