DVA-C02 Question 321
Select 4Your team is experiencing increased latency in an AWS Lambda function that processes data from an S3 bucket. The function logs are stored in Amazon CloudWatch Logs. As a developer, how can you assist in identifying the root cause of the latency issue?
- A
Review the CloudWatch Logs to identify any error messages or time-consuming operations within the Lambda function.
- B
Use AWS X-Ray to trace the Lambda function execution and identify potential bottlenecks.
- C
Increase the memory allocated to the Lambda function to reduce processing time.
- D
Check the S3 bucket's Event Notifications configuration to ensure events are being triggered properly.
- E
Analyze the Lambda function's concurrency metrics in CloudWatch to detect throttling issues.
Show answer and explanation
Correct answers: A, B, D, E
Explanation
To assist in root cause analysis, you should start by gathering detailed insights and identifying potential bottlenecks. CloudWatch Logs and AWS X-Ray are essential tools for diagnosing issues within the Lambda function. Additionally, verifying the S3 Event Notifications configuration ensures that triggering is working as expected, and analyzing concurrency metrics can reveal throttling issues. Simply increasing memory allocation does not directly address the root cause of the latency.
- A. Correct.
Reviewing CloudWatch Logs can help identify specific errors or operations taking longer than expected, which is crucial for diagnosing latency issues.
- B. Correct.
Using AWS X-Ray provides detailed tracing of the Lambda function's execution and helps pinpoint bottlenecks in the workflow.
- C. Incorrect.
Increasing memory allocation may improve performance but does not directly help in identifying the root cause of latency. It is a mitigation, not a diagnostic step.
- D. Correct.
Checking the S3 bucket's Event Notifications configuration ensures that the Lambda function is being triggered properly, which could be a potential cause of the issue.
- E. Correct.
Analyzing concurrency metrics in CloudWatch can help detect if throttling is affecting the Lambda function's performance, which is relevant for root cause analysis.