Quote Originally Posted by Valoria3 View Post
If you take down the servers to apply a patch it is NOT a HOT fix. A hot fix is done on the run with no down time (other then a quick reset usually around 15 minutes)
Hotfix has always been used to describe an urgent fix in online games even though it involves fully resetting the servers a lot of the time. The point of the term is that it's an emergency fix that they don't want to leave until the next major patch, not that it only lasts 15 minutes.

Even by the definition you provided, a "quick" restart of the realms could take a few hours because it's an MMORPG, not pacman.