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Deleting AWS Lambda? These Hidden Linked Resources Can Linger and Cost You

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Removing an AWS Lambda function does not automatically clean up all associated resources, which can lead to ongoing costs, security risks, and operational clutter. IAM roles and custom policies created for the function's execution often remain in the account even after the function is deleted. CloudWatch Log Groups tied to the Lambda continue storing logs and accruing storage costs unless manually removed or given a retention policy. VPC-enabled Lambda functions may leave behind Elastic Network Interfaces that take time to fully decommission. Triggers from services like API Gateway, EventBridge, S3, and SQS may also retain references to the deleted function, causing failed invocations if not properly cleaned up beforehand.

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Deleting AWS Lambda? These Hidden Linked Resources Can Linger and Cost You · ShortSingh