Going from 8.0.4 to 8.4 in RDS (assuming MySQL or PostgreSQL) is considered a major upgrade.
Here’s why:
- The major version is the first one or two numbers depending on the database engine.
- 8.0.x → 8.4 changes the minor/major release in PostgreSQL terms, but for MySQL, 8.0 and 8.4 are treated as different major versions by AWS RDS.
For Amazon RDS MySQL specifically:
- MySQL 8.0 and 8.4 are separate major versions (8.4 is part of the MySQL Innovation/LTS track).
- AWS treats this as a major version upgrade, meaning:
- It requires a manual upgrade (not automatic).
- You should test compatibility beforehand.
- There may be breaking changes.
For Amazon RDS PostgreSQL:
- 8.0 → 8.4 would also be a major version upgrade (though PostgreSQL is currently on version 16/17, so this scenario is uncommon).
Bottom line: Yes, 8.0.4 → 8.4 is a major upgrade on AWS RDS, and you should plan accordingly with testing, snapshots, and a maintenance window.
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