AWS Lambda durable functions increases durable operation and checkpoint payload limits

This article announces increased limits for AWS Lambda durable functions, enabling more complex and longer-running workflows.

• Maximum durable operations per execution increased from 3,000 to 30,000
• Maximum checkpoint payload size increased from 256 KB to 1 MB
• Supports longer polling periods, complex rollback paths, and larger conversation histories
• 1 MB checkpoint payloads align with Lambda async invocation and service integration limits
• FileSystem serializer available for state exceeding 1 MB using EFS or S3
• New limits apply across all AWS Regions where Lambda durable functions available

These increases enable building more resilient multi-step applications and AI workflows that can execute for up to one year with enhanced operational capacity.