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Amazon RDS Frequently Asked Questions (FAQs)

Q: How do I control if and when the engine version of my DB instance is upgraded to new supported versions?

Amazon RDS strives to keep your database instance up to date by providing you newer versions of the supported database engines. After a new version of a database engine is released by the vendor or development organization, it is thoroughly tested by our database engineering team before it is made available in Amazon RDS.

We recommend that you keep your database instance upgraded to the most current minor version as it will contain the latest security and functionality fixes. Unlike major version upgrades, minor version upgrades only include database changes that are backward-compatible with previous minor versions (of the same major version) of the database engine.

If a new minor version does not contain fixes that would benefit RDS customers, we may choose not to make it available in RDS. Soon after a new minor version is available in RDS, we will set it to be the preferred minor version for new DB instances.

To manually upgrade a database instance to a supported engine version, use the Modify DB Instance

command on the AWS Management Console or the ModifyDBInstance API and set the DB Engine Version parameter to the desired version. By default, the upgrade will be applied or during your next maintenance window. You can also choose to upgrade immediately by selecting the Apply Immediately option in the console API.

If we determine that a new engine minor version contains significant bug fixes compared to a previously released minor version, we will schedule automatic upgrades for DB instances which have the Auto Minor Version Upgrade setting to “Yes”. These upgrades will be scheduled to occur during customer-specified maintenance windows.

We will announce scheduled upgrades on the Amazon RDS Forum and send customer e-mail notifications at least 30 days in advance. We schedule them so you can plan around them, because downtime is required to upgrade a DB engine version, even for Multi-AZ instances. If you wish to turn off automatic minor version upgrades, you can do so by setting the Auto Minor Version Upgrade setting to “No”.

In the case of RDS for Oracle and RDS for SQL Server, if the upgrade to the next minor version requires a change to a different edition, then we may not schedule automatic upgrades even if you have enabled the Auto Minor Version Upgrade setting. The determination on whether to schedule automatic upgrades in such situations will be made on a case-by-case basis.

Since major version upgrades involve some compatibility risk, they will not occur automatically and must be initiated by you (except in the case of major version deprecation, see below).

For more information about upgrading a DB instance to a new DB engine version, refer to the Amazon RDS User Guide.

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