Where & why are the cache files stored on my server?
The cache files are stored in a special directory: /wp-content/cache/. This directory needs to remain writable, just like the /wp-content/uploads directory on many WordPress® installations. The /cache directory is where MD5 hash files reside. These files are named ( with an MD5 hash ) according to your MD5 Version Salt and the HTTP_HOST/REQUEST_URI. ( See: Quick Cache -> Config Options -> MD5 Version Salt ). Whenever a request comes in from someone on the web, Quick Cache checks to see if it can serve a cached file, it looks at your Salt, it looks at the HTTP_HOST/REQUEST_URI, then it checks the /cache directory. If a cache file has been built already, and it matches your Salt.HTTP_HOST.REQUEST_URI combination, and it is not too old ( See: Quick Cache -> Config Options -> Expiration ), then it will serve that file instead of asking WordPress® to re-generate it. This adds tremendous speed to your site and reduces server load. If you have GZIP compression enabled, then the cache file is
