Occasionally, AWS performs maintenance on the hardware that underlies your EC2 instances. Maintenance doesn't necessarily mean you must significantly change your infrastructure—it's possible that you might only need to prepare for a few minutes of downtime.

You can view what type of maintenance is necessary and which instances are affected in the

Note: Because the EC2 console shows only one Region at a time, you might need to change the Region you're viewing to see all the events that affect your resources.

For information on instance maintenance, as well as strategies for scheduling or mitigating downtime related to maintenance, see