REDIS is an object cache (not a query cache) that operates at the WordPress level and available with all of our VPS solutions.\u00a0We configure this to increase the access speed to major entities, posts, users, tags, etc. on the backend. Given there are\u00a0sane default settings in place, we can be flexible\u00a0and\u00a0work with you in fine tuning that list for optimization purposes as necessary.\r\n\r\nREDIS runs on the same instance as your webserver. It's only used by your WordPress site with the data in REDIS coming from your WordPress app exclusively. There's an instance used for PHP only, sessions (if you are using them) and the object cache.