[Resolved 10:38 AM PST, 27 January 2015] The rolling maintenance is now complete.
[Updated 6:53 AM PST, 27 January 2015] The rolling maintenance for the main Second Life server channel is now in progress.
[Posted 7:51 PM PST, 26 January 2015] We will be performing rolling maintenance for regions on the main Second Life server channel on Tuesday, January 27th, beginning at approximately 3:00 AM PST. Please refrain from rezzing no copy objects, making inworld L$ transactions and remember to save all builds.
Source: http://status.secondlifegrid.net