[RESOLVED 9:54 AM PDT, 17 September 2013] Rolling restarts for the main Second Life Server have been completed.
[UPDATED 7:00 AM PDT, 17 September 2013] Rolling restarts for the main Second Life server channel are now underway.
[POSTED 7:45 pm PDT, 16 September 2013] We will be performing rolling restarts for regions on the main Second Life server channel on Tuesday, September 17, beginning at approximately 5:00AM PDT. Please refrain from rezzing no copy objects, making inworld L$ transactions and remember to save all builds
Source: http://status.secondlifegrid.net