It's not a good idea to use a single Redis instance for both caching and persisted/transactional data (background jobs). For background jobs, you need real-time persistence with AOF. For caching, you want everything in memory, and you need an LRU cache that evicts any old data. This means you should run two Redis instances with different configurations. But in that case, it can be a good idea to use Memcached, which is recommended by Mike Perham [1].
[1] http://www.mikeperham.com/2015/09/24/storing-data-with-redis...
