World Restarts
 

Hi all,
As I've been working on my custom server I've been wondering something:

What necessitates a world restart?

Just making some observations, I've noticed that some database changes don't really need it. Working with the merc vendors, a #repop in-game would update those so I'm just curious as to what types of changes require world restarts?

new Factions, new Loottables.

Also, I normally change items while the server is not running as changing them while the server is running can cause bugs, although there are ways around that apparently.