AWS Serverless Application Model (AWS SAM) Now Supports AWS X-Ray

The AWS Serverless Application Model (AWS SAM) has introduced AWS X-Ray support. You can now configure the X-Ray tracing mode for your Lambda functions within your SAM template. X-Ray helps you analyze and debug distributed applications. With X-Ray, you can identify the root cause of performance issues and errors in your Lambda functions.

Read More here: https://aws.amazon.com/about-aws/whats-new/2017/06/aws-serverless-application-model-aws-sam-now-supports-x-ray/