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What is Amazon DocumentDB Serverless?

Amazon DocumentDB Serverless is an on-demand, auto scaling configuration for Amazon DocumentDB (with MongoDB compatibility). It automatically scales capacity up or down in fine-grained increments based on your application's demand, offering up to 90% cost savings compared to provisioning for peak capacity. For applications with variable workloads, Amazon DocumentDB Serverless offers simplified resource management, with no upfront commitments or additional costs, so you only pay for the database capacity used. Amazon DocumentDB Serverless provides the same MongoDB compatible-APIs and capabilities as Amazon DocumentDB, including read replicas, Performance Insights, and I/O-Optimized storage. It is ideal for a broad set of applications with variable and multi-tenant workloads. Amazon DocumentDB Serverless is available starting with Amazon DocumentDB 5.0 for both new and existing clusters.

Use cases

For highly variable or unpredictable workloads, you no longer need to over-provision for peak capacity and avoid overspending on resources you don't constantly use. You can avoid provisioning to average capacity, which can cause performance problems and a poor user experience. This is suitable for use cases such as auditing, seasonal promotions, surges during peak business hours, or agentic workflows that are invoked at unpredictable times.

Software-as-a-service (SaaS) applications vendors no longer need to manage capacity for individual customers as Amazon DocumentDB Serverless can manage capacity across multi-tenant clusters or enterprise-wide database fleets.

For deploying new applications where instance sizing is not yet determined, you can set up clusters with one or many instances and Amazon DocumentDB Serverless will autoscale to the capacity your application needs.