How long is the Amazon RDS maintenance window?

Last updated: 2019-12-12

What is the duration of an Amazon Relational Database Service (Amazon RDS) maintenance window?


Amazon RDS maintenance sometimes is required to update a database engine version or the operating system (OS) of a DB instance or DB cluster. The duration of the maintenance varies based on the operations that are scheduled for your DB instances and the operations that start during the maintenance window.

When you create or modify a DB instance, you can configure the maintenance window. You can schedule maintenance to occur once a week at a specified time and that lasts between 30 minutes and up to 12 hours. This sets the window for maintenance actions from Amazon RDS to be scheduled and started.

You can minimize downtime during required Amazon RDS maintenance by modifying your DB instance to a Multi-AZ deployment before the scheduled update.

Maintenance Window end time

Updates can take longer to complete than the maintenance window time frame. For example, updates can take longer if there is a large list of files that must be updated or if a DB instance restart is required.

When the instance is updated, the duration of the downtime varies based on whether the maintenance is an OS update or a database engine version update.

Note: The Amazon managed maintenance period can't be proactively started outside the maintenance window, but you can adjust your weekly maintenance period accordingly. If you want scheduled maintenance to occur sooner, you can adjust the preferred DB instance maintenance window to occur according to your needs.