Perform root cause analysis, instrument code for observability, and optimize application performance (~18% of exam).
Covers assisting in root cause analysis including debugging code defects, interpreting metrics/logs/traces, querying logs, implementing custom metrics with CloudWatch EMF, reviewing application health with dashboards, troubleshooting deployment failures, and debugging service integration issues. Also covers instrumenting code for observability including differences between logging/monitoring/observability, effective logging strategies, custom metrics emission, tracing annotations, notification alerts, AWS tracing tools, structured logging, and health checks/readiness probes. Additionally covers optimizing applications including concurrency concepts, performance profiling, memory and compute sizing, subscription filter policies, request header caching, application-level caching, resource usage optimization, and identifying performance bottlenecks through logs.
5 minutes
5 Questions
Troubleshooting and Optimization are critical skills for AWS Certified Developer - Associate certification, focusing on identifying issues and improving application performance within AWS environments.
**Troubleshooting** involves systematically diagnosing and resolving problems in AWS applications. Key areas include:
1. **CloudWatch Logs and Metrics**: Developers use Amazon CloudWatch to monitor application logs, set alarms, and analyze performance metrics. Understanding how to filter logs, create metric filters, and interpret dashboard data is essential.
2. **X-Ray Tracing**: AWS X-Ray helps trace requests through distributed applications, identifying bottlenecks, latency issues, and errors across microservices. Developers analyze service maps and trace segments to pinpoint problematic components.
3. **Lambda Debugging**: Common issues include timeout errors, memory limitations, cold starts, and permission problems. Reviewing execution logs and understanding IAM role configurations helps resolve these challenges.
4. **API Gateway Issues**: Troubleshooting involves checking integration responses, CORS configurations, throttling limits, and authorization settings.
**Optimization** focuses on enhancing performance, cost-efficiency, and scalability:
1. **Caching Strategies**: Implementing ElastiCache, DAX for DynamoDB, or API Gateway caching reduces latency and database load.
2. **Lambda Optimization**: Adjusting memory allocation, using provisioned concurrency to minimize cold starts, and optimizing package sizes improves function performance.
3. **DynamoDB Performance**: Choosing appropriate partition keys, using Global Secondary Indexes effectively, and implementing on-demand or provisioned capacity based on workload patterns.
4. **S3 Performance**: Utilizing multipart uploads for large files, Transfer Acceleration, and proper prefix distribution enhances throughput.
5. **Code-Level Improvements**: Connection pooling, efficient SDK usage, and implementing exponential backoff for retries optimize application behavior.
Developers must understand how to interpret error codes, analyze CloudWatch insights, configure proper logging levels, and implement monitoring solutions that provide visibility into application health and performance across all AWS services used in their applications.Troubleshooting and Optimization are critical skills for AWS Certified Developer - Associate certification, focusing on identifying issues and improving application performance within AWS environments.
**Troubleshooting** involves systematically diagnosing and resolving problems in AWS application…