Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 303 discussion

X-ray will provide better insights for performance

X-Ray for performance

I think the answer is A The goal is to analysis past executions of the Lambda functions, to isolate and identity the slow Lambda functions. This can be done with option A. Option D does not retroactively analyse past executions of Lambda functions - therefore it's not as effective as option A ~~

C is the correct answer.

https://docs.aws.amazon.com/lambda/latest/operatorguide/general-approach.html#:~:text=Use%20X%2DRay%20to%20find%20all%20the%20services%20involved%20in%20a%20request.%20For%20larger%20serverless%20applications%2C%20this%20is%20the%20fastest%20way%20to%20locate%20all%20of%20the%20interactions%20involved%20in%20the%20request.%20From%20X%2DRay%2C%20isolate%20the%20service%20where%20latency%20or%20errors%20are%20occurring%20then%20drill%20down%20further. It clearly an interaction issues among the services no failure has occurred

not sure between A and C but going with C.

A. Perform a query across all the Lambda function log groups by using Amazon CloudWatch Logs Insights. Filter on type of report and sort descending by Lambda function execution duration. Here's why this approach is most efficient: Centralized Logs: CloudWatch Logs Insights allows you to query logs across all your Lambda function log groups in a single location. Targeted Filtering: You can filter the query to focus on specific time periods of high traffic, pinpointing anomalies during those times. Sorting by Duration: By sorting the results descending by execution duration, you can easily identify Lambda functions with the slowest execution times. Fast Insights: CloudWatch Logs Insights offers near real-time analysis, enabling you to quickly identify performance bottlenecks.

Hesitate. A or C?