amazon-web-servicesrds

Why are my AWS RDS backups being retained longer than configured?


I have configured RDS to retain backups (snapshots) for 1 day, but I always see 3 days worth of backups being retained. Why?

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Solution

  • Q: Why do I have more automated DB snapshots than the number of days in the retention period for my DB instance?

    It is normal to have 1 or 2 more automated DB snapshots than the number of days in your retention period. One extra automated snapshot is retained to ensure the ability to perform a point in time restore to any time during the retention period. For example, if your backup window is set to 1 day, you will require 2 automated snapshots to support restores to any within previous 24 hours. You may also see an additional automated snapshot as a new automated snapshot is always created before the oldest automated snapshot is deleted.

    https://aws.amazon.com/rds/faqs/