Generally Available: Azure Cosmos DB dynamic scaling—per region and per partition autoscale

Thanks to your feedback, Azure Cosmos DB now provides dynamic scaling to help you optimize costs for nonuniform, large-scale workloads. By default, Azure Cosmos DB autoscale scales your workloads uniformly based on the most active region and partition. This behavior can cause unnecessary scale-ups if only one or few your partitions are active. The new dynamic scaling behavior enables your workload partitions and regions to scale independently based on usage—improving cost efficiency with zero downtime or performance impact.

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