AWS Lambda
Developer Guide

AWS Lambda Limits

AWS Lambda limits the amount of compute and storage resources that you can use to run and store functions. The following limits apply per-region and can be increased. To request an increase, use the Support Center console.

Resource Default Limit

Concurrent executions


Function storage per region

75 GB

For details on how Lambda scales your function concurrency in response to traffic, see Understanding Scaling Behavior.

The following limits apply to function configuration, deployments, and execution. They cannot be changed.

Resource Limit

Function memory allocation

128 MB to 3008 MB, in 64 MB increments.

Function timeout

900 seconds (15 minutes)

Function environment variables

4 KB

Invocation payload (request and response)

6 MB (synchronous)

128 KB (asynchronous)

Deployment package size

50 MB (zipped)

256 MB (unzipped)

3 MB (console editor)

Test events (console editor)


/tmp directory storage

512 MB

File descriptors


Execution processes/threads


Limits for other services, such as AWS Identity and Access Management, Amazon CloudFront (Lambda@Edge), and Amazon Virtual Private Cloud, can impact your Lambda functions. For more information, see AWS Service Limits.