Smooth Sailing Through RDS planned lifecycle event for M4, R4, or T2 instance types

Bhargav Shah
3 min readMar 13, 2024

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Amazon RDS for MySQL, MariaDB, and PostgreSQL database instances running on M4, R4, and T2 instance types

If you have one or more Amazon RDS for MySQL, MariaDB, and PostgreSQL database instances running on M4, R4, and T2 instance types then you have received notification from AWS about RDS planned lifecycle event.

Starting March 11, 2024, Amazon RDS will begin disabling the creation of Amazon RDS for MySQL, MariaDB, and PostgreSQL database instances running on M4, R4, or T2 instance types. And starting on June 1, 2024, Amazon RDS will make best effort to begin upgrading MySQL, MariaDB, and PostgreSQL database instances running on M4, R4, or T2 instance types to equivalent size M5, R5, or T3 newer generation instance type, if available.

If you missed the notification, you can verify this information by logging into your AWS account.

AWS Scheduled Changes

AWS has strongly recommend that you migrate your existing Amazon RDS database instances running M4, R4, and T2 instance types to newer generation instance types before May 31, 2024. You may use the following recommendation:

  • Upgrade M4 instance to M5 instance or higher
  • Upgrade R4 instance to R5 instance or higher
  • Upgrade T2 instance to T3 instance or higher

Let’s Upgrade Our Development Environment RDS (T2)

  1. Before proceeding, let’s ensure we have a backup of our RDS.

2. Select the targeted RDS instance and click “Modify”

3. Change the instance type. In my case, it is from T2 to T3.

4. Apply this change during our next scheduled maintenance window. Note that this change will result in downtime. (Refer to Modifying an Amazon RDS DB Instance).

5. Once the RDS starts changing, the status will display as “Modifying,” and once the upgrade is complete, it will show “Available.”
※This process will take approximately a few minutes.

Note: If your instances are running a production load, you should consider using the Amazon RDS Blue/Green Deployment strategy to minimize downtime and risk.

Reference links:
Amazon RDS Blue/Green Deployments
[1] https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/blue-green-deployments.html

Modifying an Amazon RDS DB instance
[2]https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Overview.DBInstance.Modifying.html

Support Center
[3] https://aws.amazon.com/support

Checked off the list, onto the next adventure.

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