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How Much Time Does Rds Upgrade Take? [Solved]
During major version upgrades to version 5.7, Amazon RDS for MySQL rebuilds some of your tables. All date and time column types are converted to the new format, which can take several hours to days. The duration depends on the amount of data in your tables.23 Jul 2021
Upgrade AWS RDS with a minimum downtime
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AWS RDS major version upgrade
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Minimal Downtime major version upgrade for PostgreSQL | Amazon Web Services
Learn how to perform minimal downtime PostgreSQL Major version
