Understanding how ACU minimum and maximum range impacts scaling in Amazon Aurora Serverless v2
Database Blog
This article explores how Aurora Serverless v2 scaling works by examining different Aurora Capacity Unit (ACU) configuration scenarios for database workloads.
- Aurora Serverless v2 automatically scales database capacity between specified minimum and maximum ACUs
- ACUs range from 0.5 to 256, representing combined computing resources
- Three test cases demonstrated different scaling behaviors:
- Irregular workloads (0.5-10 ACUs)
- Consistent high-volume workloads (4-10 ACUs)
- Cost-sensitive applications (4-20 ACUs)
- Key observations:
- Quick scaling up during demand spikes
- Higher minimum ACUs provide better baseline performance
- Scaling down is gradual to maintain stability
Recommendations include setting balanced minimum ACUs, configurable maximum ACUs, optimizing queries, and using Performance Insights to monitor database performance.
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