Help understanding cache options

I have SimpleCache and System Cache enabled currently, but my performance page says Memcache, Redis, and Apache mod_cache are unavailable. I am using 3.3.13.

I see in the documentation that I could also do boot cache, X-Sendfile (I'm on Apache2), Composer Autoloader Optimization (2 ways), or a PHP code cache. Plus image caching.

How many cache methods am I supposed to use, as many as possible? Or which combination(s) are most effective? Should I start with Memcache and mod_cache and X-Sendfile or what?


Performance and Scalability

Performance and Scalability

If you've got a need for speed, this group is for you.