Zet - What is an ACU? (Aurora Capacity Unit)

What is an ACU? (Aurora Capacity Unit)

An ACU represents the modular unit of performance and scalability in Aurora Serverless v2, combining memory, CPU, and networking to optimize database efficiency and cost-effectiveness.

An Aurora Capacity Unit (ACU) is the unit of measurement for capacity in Amazon Aurora Serverless v2. Each ACU provides a combination of:

• Approximately 2 GiB of memory
• Corresponding CPU resources
• Networking throughput

ACUs enable fine-grained scaling of database resources to align with application demands. The database dynamically adjusts its capacity in small increments (measured in ACUs), ensuring efficient resource utilization and cost savings. This scaling capability is a key feature of Aurora Serverless, making it ideal for workloads with fluctuating resource needs.

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