This plugin cache web requests and store static html code to your database.
This plugin cache web requests and store static html code to your database. You can configure what urls do not to cache, witch users don't to cache and ect. After first web request plugin creates a cache of this requested webpage, and on second request your webserver will serve html code stored in database cache table instead of processing the comparatively heavier and more expensive WordPress PHP scripts.
It has many options to drive caching process.