AWS raised the maximum number of durable operations per Lambda execution from 3,000 to 30,000, enabling workflows to execute more iterations, longer polling periods, and complex rollback paths. The checkpoint payload size also increased from 256 KB to 1 MB, allowing workflows to store larger data such as full event payloads from services like Amazon SQS and EventBridge in a single checkpoint.
This upgrade supports building resilient multi-step workflows and AI applications capable of running for up to one year with automatic retries and checkpointing. For states exceeding 1 MB, SDKs can offload to persistent storage solutions like Amazon EFS or S3 mounts. These expanded limits are applicable in all AWS Regions where Lambda durable functions are available.
Source & further reading
AWS Lambda durable functions increases durable operation and checkpoint payload limits ↗Source published 2026-10-13. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.