AWS Lambda timeout raised 6x to 90 minutes for managed instance event-driven functions

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AWS has increased the maximum execution timeout for Lambda functions using Event Source Mapping (ESM) on Lambda Managed Instances (LMI) from 15 minutes to 90 minutes, a sixfold improvement. The change addresses longstanding limitations for workloads such as AI inference, media transcoding, financial simulations, and large-scale ETL pipelines that routinely exceed the previous 15-minute cap. The extended timeout applies only to asynchronous and ESM invocations on managed instances; standard on-demand Lambda functions and synchronous invocations via API Gateway or load balancers remain capped at 15 minutes. Supported event sources include SQS, Kinesis, DynamoDB Streams, Amazon MSK, and self-managed Apache Kafka, while Amazon MQ and DocumentDB mappings are still limited to 15 minutes. AWS confirmed there is no additional charge for the new limit, with standard managed instance compute rates continuing to apply.

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