[RESOLVED 9:10 AM PST 10 December 2013] The rolling restarts for the main Second Life server channel are now complete.
[UPDATED 6:53 AM PST 10 December 2013] The rolling restarts for the main Second Life server channel are now in progress.
[Posted 11:45 PM PST, 09 December 2013] We will be performing rolling restarts for regions on the main Second Life server channel on Tuesday, December 10th, beginning at approximately 5:00AM PST. Please refrain from rezzing no copy objects, making inworld L$ transactions and remember to save all builds.
Source: http://status.secondlifegrid.net