[RESOLVED 9:43 AM PDT, 20 August 2013] The rolling restart for the main Second Life server channel are now complete.
[UPDATED 6:48 AM PDT, 20 August 2013] We are currently undergoing the rolling restarts for the main Second Life server channel.
[Posted 10:34 pm PDT, 19 August 2013] We will be performing rolling restarts for regions on the main Second Life server channel on Tuesday, August 20, 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