Q: What accounts for the frequent "emergency" maintenance downtime? What issues are you attempting to resolve?

A: The emergency maintenance periods are to restore stability while we continue to narrow down the cause of the problems. Some of them are also to deploy temporary fixes to various in-game systems while we continue to develop a longer term, more stable solution. World of Warcraft delivers many complex features that are unique to MMOGs. Features such as the in-game mail system, auction houses, player inventories, flight paths, quest states, etc. use a lot of server bandwidth, which makes pinpointing problems on the server infrastructure much more complicated.

Recently, the extended emergency downtime for a certain number of realms was needed in order to better accommodate our growing player base. Some of the upgrades that we planned for all of the realms were made to these realms first, as they are among the most populated and thus most in need of aid. We set the realms up on the latest top-of-the-line hardware and made the software upgrades accordingly, but some unforeseen issues cropped up with the database that resulted in the problems players currently see. This is no fun for our player base, of course, and we don't want to keep the realms running in a condition that frustrates our customers when we can attempt to fix things . So, these downtimes have been used to change hardware and apply fixes that will hopefully alleviate the issues. We have not yet resolved the problems, but we're working on this around the clock.