AWS Bites 120. Lambda Best Practices
Apr 4, 2024
Dive into the nitty-gritty of AWS Lambda, featuring insights on cold starts and warm starts. Discover the distinctions between synchronous, asynchronous, and event-based invocations, along with tips on performance and cost optimization. Learn about the pricing structure and the impact of memory allocation on expenses. Explore effective structuring practices for Lambda functions, including minimal handler functions. Plus, uncover the balance between simplicity and testability in development, utilizing middleware for enhanced security.
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Lambda Cold vs Warm Starts
- AWS Lambda operates with a cold start where infrastructure is spun up, causing a delay before execution.
- Warm starts reuse existing infrastructure to speed up executions, improving efficiency.
Invocation Type Best Practices
- Choose invocation types carefully: synchronous needs low latency, asynchronous handles retries, and polling requires queue monitoring.
- Implement idempotency to handle potential multiple event deliveries safely.
Optimize Lambda Performance and Cost
- Use the Lambda Power Tuning tool to find your function's optimal memory and cost configuration.
- Consider compiled runtimes like Rust or Go for CPU-intensive Lambdas to reduce cold start and execution times.