The RDS Maintenance Window is a scheduled time period when Amazon RDS performs system maintenance on your database instance. This maintenance may include:
* Software updates (e.g., patching the database engine)
* Security updates (e.g., fixing vulnerabilities)
* Instance reboots (if required for updates)
* Backup and recovery operations
* Scaling or hardware maintenance
Key Features of RDS Maintenance Window :
1. Configurable Timing:
- You can define a weekly maintenance window for each RDS instance.
- Choose a time outside of peak business hours to minimize disruptions.
2. Automatic Scheduling:
- AWS automatically applies critical updates during the next scheduled maintenance window.
3. Minimal Downtime:
- Some updates may require downtime, while others are applied without impact.
- Multi-AZ deployments minimize downtime by updating the standby instance first, then switching over.
4. Immediate or Deferred Updates:
- You can apply updates immediately or wait until the next maintenance window.
- Some mandatory updates (e.g., security patches) may be enforced by AWS.
