Some unusual behaviour late yesterday evening within our database engine and we had a handful of outages no more than a few minutes each; I paused the service of Coffee a couple of times while I investigated and took additional off-site backups. Problems cleared in the early hours, but I have no definitive answer to what triggered them - just an educated guess. Issues did NOT get to the point of formally shutting for maintenance or flagging ongoing issues, but please bookmark
http://status.passenger.chat in case we ever hit something more serious.
Standard advice (abundance of caution) - if you compose a long or difficult post, please keep a local copy just in case - our systems are not strong to a safety-critical standard and should the server crash or have an accident, restoration may miss some recent activity.