On October 30, 2014 at 2pm Pacific Time (5pm Eastern, 21:00 UK/GMT, 22:00 CET) we’re going to upgrade the RAM in our database server. This means that we’ll have a complete site-wide outage for about 15 minutes.
We’ll tweet details from @musicbrainz as the time approaches and we’ll have a notice on the site shortly before the down time.
Sorry for the inconvenience.
MetaBrainz Blog 