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What determines when are RDS automatic minor version upgrades enabled for specific DB engine versions?
What determines when automatic minor version upgrades will be done for a specific DB engine version? I know it's based on when AWS enables it, but what determines that? Is it based on the end of support for the DB engine version, or something else?
In my case, I have a DB that is MySQL v5.7.38. Currently, there are no auto upgrades enabled for that version. I have access to an internal tool at a client lists that version as EOL at the end of June 2023, so I wonder if an auto-upgrade will be triggered soon.
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Automatic Minor upgrades to a specific DB engine version is determined based on the End of support of the version used in the current time, first AWS RDS team will test and approve the Minor upgrade, check that everything works smoothly, and then will send an email notification to all customers that have deprecated version engine, asking them to perform the upgrade ahead of time. You can perform a manual upgrade or you can enable automatic upgrade, please refer to this link for more information: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html
Minor version upgrades depend on several factors:
- As you mentioned, the “Automatic minor version upgrades” option must be enabled.
- The minor version upgrade must be smaller than the target version
- There must be compatibility between versions and there must be critical security updates available in a newer, smaller version.
To find out what versions are available for your engine and your version, you can consult the following: [+] Upgrading a DB instance engine version - Finding automatic minor version upgrade targets - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html#USER_UpgradeDBInstance.Upgrading.targets
More references: [+] Upgrading <span>a DB instance</span> engine version - Automatically upgrading the minor engine version - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html#USER_UpgradeDBInstance.Upgrading.AutoMinorVersionUpgrades [+] Upgrading <span>a DB instance</span> engine version - How automatic minor version upgrades work - https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html#USER_UpgradeDBInstance.Upgrading.scheduled
