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AWS Lambda announces Provisioned Mode for SQS event source mapping (ESM)

Published
November 14, 2025
https://aws.amazon.com/about-aws/whats-new/2025/11/aws-lambda-provisioned-mode-sqs-esm

AWS Lambda Provisioned Mode for SQS Event Source Mappings

AWS Lambda introduces Provisioned Mode for SQS event source mappings (ESMs), optimizing throughput for Amazon SQS by provisioning event polling resources ready to handle sudden traffic spikes. This mode scales 3x faster and supports 16x higher concurrency than default SQS ESM capability.

Provisioned Mode allows fine-tuning of ESM throughput by setting a minimum and maximum number of event pollers, enabling lower latency event processing and effective handling of traffic spikes. This feature is available in all AWS Commercial Regions and can be activated via ESM API, AWS Console, AWS CLI, AWS SDK, AWS CloudFormation, and AWS SAM.

What to do

  • Configure minimum and maximum event pollers in ESM settings.
  • Monitor and adjust poller numbers based on application needs.
  • Review Lambda ESM documentation and pricing for details.

Source: AWS release notes




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