Sysadmin notified for Server issues on Gaia.
Gaia have been restarted and should be good again. (for now) :)
Any plans to fix the problem on a more structural basis than rebooting the server every single night?
Just at a guess, I would say the Systems team is aware of the issue and is trying to find and fix what is causing the issue. It is not likely to be software as it seems to be only Gaia. Over on Ayvenas we have been perfectly stable. So, for now, the answer is to reboot frequently until a fix is found.