NGINX Plus does indeed include an extremely scalable caching engine for both static and dynamic content. Caching is supported for all proxy-modes/protocols, such as HTTP/FastCGI/uwsgi/SCGI. Cached content is stored in a hybrid cache – hot content is stored in memory, and all content is stored on an on-disk cache that persists across software restarts and reboots. For more information please see: Content Caching with NGINX Plus