What is automated scaling in Amazon RDS, and how does it work? How do you configure it?
Automated scaling in Amazon RDS is a feature that automatically adjusts the database instance’s capacity based on workload demand. It helps maintain optimal performance and cost efficiency by dynamically adding or removing resources as needed.
It works by monitoring key metrics, such as CPU utilization and connections, to determine when to scale up or down. When thresholds are crossed, RDS triggers an automatic scaling event, modifying the instance size or read replica count accordingly.
To configure automated scaling, follow these steps :
1. Navigate to the AWS Management Console and select RDS.
2. Choose your desired database instance.
3. In the “Modify” section, enable “Auto Scaling.”
4. Set target values for monitored metrics (e.g., 70% CPU utilization).
5. Define minimum and maximum limits for scaling (e.g., min: db.t2.micro, max: db.m4.large).
6. Specify cooldown periods to prevent rapid fluctuations in capacity.
7. Save changes and apply during the next maintenance window or immediately.
