User blog comment:TOR/Caching Explained/@comment-3335785-20130327230944/@comment-23865-20130327231718

Cåm, great questions!

As for your first one, if what you mean is edits to MediaWiki:Monobook.css, MediaWiki:Common.css & MediaWiki:Wikia.css (and their JS counterparts) not showing up immediately, then yes, that is by design. If the changes take more than 24h to take effect, then that would be a bug and you should notify us.

Your second questions falls under what I touched on in the "Deep under the hood" section of my post. The HTML form of all wiki pages is stored in parser cache when they are displayed. But since DPL listings can be very heavy and take a long time to compute, it doesn't make much sense to recalculate them every time somebody corrects a typo anywhere on the page. That's why they have a separate caching mechanism.

Hope that answers your questions. :)