AWS Lambda increases the file descriptor limit to 4,096 for functions running on Lambda Managed Instances

AWS Lambda File Descriptor Limit Increase

AWS Lambda has increased the file descriptor limit from 1,024 to 4,096 for functions running on Lambda Managed Instances (LMI). This allows for running I/O intensive workloads such as high-concurrency web services and file-heavy data processing pipelines.

Lambda functions can now handle more simultaneous requests, enabling larger connection pools and effective use of multi-concurrency for functions on LMI.

What to do

• Update your Lambda functions to take advantage of the increased file descriptor limit.
• Consider migrating to Lambda Managed Instances for I/O intensive workloads.

Source: AWS release notes

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