[x-yuri]

вот сегодня наткнулся:

View Caching
Configuration: Global Config->Cache
Caches: each view of a component
Based on: URL, view, parameters, ...
More info: Component developers have to include this in their code to work. Mostly this is not done. The Joomla main content component uses this, but only for guest visitors of your site though this is not obligated for every component.

Module Caching
Configuration: Global Config->Cache
Caches: each module (individually customized via each module's Advanced Parameters)
Based on: ?
More info: You must disable it on some modules to avoid problems

http://docs.joomla.org/Cache