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AWS Lambda (sdk) CodeStorageExceededException

The total size of all Lambda function code in the account exceeds the limit.

Understanding AWS Lambda

AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. It automatically scales your applications by running code in response to triggers such as changes in data, shifts in system state, or user actions. Lambda is designed to handle a variety of workloads, from simple web apps to complex data processing pipelines.

Recognizing the Symptom: CodeStorageExceededException

When working with AWS Lambda, you might encounter the CodeStorageExceededException. This error indicates that the total size of all Lambda function code in your AWS account has exceeded the allowed limit. This can prevent you from deploying new functions or updating existing ones.

Details About the CodeStorageExceededException

The CodeStorageExceededException is triggered when the cumulative size of all your Lambda function code exceeds the storage limit set by AWS. This limit is typically 75 GB per region. When this limit is reached, AWS Lambda will not allow further deployments or updates until the total storage size is reduced.

Why Does This Happen?

This issue often arises when there are numerous functions deployed, especially if they include large dependencies or if old versions of functions are not cleaned up. Each version of a Lambda function counts towards the total storage limit.

Steps to Resolve the CodeStorageExceededException

To resolve this issue, you need to reduce the total storage used by your Lambda functions. Here are the steps you can take:

1. Identify Unused or Old Lambda Functions

Start by identifying Lambda functions that are no longer in use or have outdated versions. You can use the AWS Management Console or AWS CLI to list all functions:

aws lambda list-functions

Review the list and identify functions that can be deleted.

2. Delete Unused Functions

Once you've identified unused functions, delete them to free up space. Use the following command to delete a function:

aws lambda delete-function --function-name your-function-name

Ensure that you replace your-function-name with the actual name of the function you wish to delete.

3. Clean Up Old Versions

Lambda retains old versions of functions, which can accumulate and consume storage. Use the following command to list versions of a specific function:

aws lambda list-versions-by-function --function-name your-function-name

Delete older versions that are no longer needed:

aws lambda delete-function --function-name your-function-name --qualifier version-number

4. Request a Limit Increase

If you need more storage, consider requesting a limit increase from AWS Support. Visit the AWS Support Center and create a new case to request an increase in your Lambda storage limit.

Conclusion

By following these steps, you can effectively manage your AWS Lambda storage and avoid the CodeStorageExceededException. Regularly reviewing and cleaning up your Lambda functions will help maintain optimal storage usage. For more information, refer to the AWS Lambda Limits Documentation.

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