Monitoring (1/4)
How do you monitor a Lambda function’s performance?

    Monitoring the performance of a Lambda function is crucial for identifying bottlenecks, debugging failures, and optimizing cost. AWS provides built-in tools like Amazon CloudWatch, AWS X-Ray, and Lambda Insights to help you track execution metrics, logs, and traces.

    Ways to Monitor Lambda Performance
    • Amazon CloudWatch Logs: Captures logs generated by the function (e.g., `console.log`, `print`).
    • Amazon CloudWatch Metrics: Provides key metrics such as invocation count, duration, errors, throttles, and concurrent executions.
    • AWS X-Ray: Enables distributed tracing of requests across AWS services to pinpoint latency issues.
    • CloudWatch Alarms: Alerts you when metrics cross thresholds (e.g., high error rate or duration).
    • Lambda Insights: Offers deeper visibility into performance, memory usage, CPU load, and more.
    • Custom Metrics: You can push additional metrics using the CloudWatch API for business-specific monitoring.
    Enabling X-Ray Tracing via AWS CLI