Cold Start Hell
Lambda cold starts are killing your image processing pipeline.
The Scenario
An image processing service running on AWS Lambda is timing out. Cold starts are taking 8-12 seconds, well beyond the API Gateway timeout. Users are seeing 504 errors when uploading images. The service worked fine at low traffic but is falling apart under load. You need to diagnose the cold start issue and implement a fix.
What You'll Learn
Understanding Lambda cold starts and their causes
Diagnosing timeout chains: API Gateway -> Lambda -> downstream services
Optimizing Lambda package size, runtime, and memory allocation
Provisioned concurrency, keep-warm strategies, and architecture alternatives
Tools You'll Use
Real-World Context
Cold start latency is the Achilles' heel of serverless architectures. Companies like Coca-Cola, iRobot, and Thomson Reuters have all had to solve cold start issues in production.
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