I am trying to log all night and my viewer says (waiting for server response)what does that mean?

[Phothira]

I am trying to log all night and my viewer says (waiting for server response)
what does that mean? I can not log in but? or is in maintenance?

[Darren Scorpio]

It seems so yes.

[Posted 9:41 PM PST, 09 March 2015] We are currently performing unscheduled inventory database maintenance. During this time, some residents may experience login issues, inventory loading issues and an inability to rez. Residents inworld may also be logged off. Please refrain from rezzing no-copy objects and making L$ transactions during this maintenance. Please check back here for updates.