129. Lambda Provisioned Concurrency

In this episode, we discuss AWS Lambda provisioned concurrency. We start with a recap of Lambda cold starts and the different concurrency control options. We then explain how provisioned concurrency works to initialize execution environments in advance to avoid cold starts. We cover how to enable it, pricing details, common issues like over/under-provisioning, and alternatives like self-warming functions or using other services like ECS and Fargate.

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🔖 Chapters:

00:00 Intro
01:03 Recap of Lambda cold starts
06:03 Reserved vs. provisioned concurrency
09:06 How provisioned concurrency works
10:48 Enabling provisioned concurrency
13:21 Provisioned concurrency pricing
14:53 Common issues and troubleshooting
16:59 Alternatives to provisioned concurrency
20:44 AWS might solve problems for you
21:28 Closing notes


In this episode, we mentioned the following resources:

Episode 60: "What is AWS Lambda": https://awsbites.com/60-what-is-aws-l...
Episode 104: "Explaining AWS Lambda Runtimes": https://awsbites.com/104-explaining-l...
Episode 108: "Solving Lambda Cold Starts in Python": https://awsbites.com/108-how-to-solve...
Episode 120: "Lambda Best Practices": https://awsbites.com/120-lambda-best-...
AWS Lambda Concurrency Explained by James Eastham:    • AWS Lambda Concurrency Explained  
Provisioned Concurrency pricing: https://aws.amazon.com/lambda/pricing...
Less than 1% of invocations are cold-starts (statement): https://docs.aws.amazon.com/lambda/la...
Middy Warmup Middleware: https://middy.js.org/docs/middlewares...
Lambda speculative warm-up init (mention in the Docs): https://docs.aws.amazon.com/lambda/la....
Episode 64: "How do you write Lambda Functions in Rust": https://awsbites.com/64-how-do-you-wr...
Episode 128: "Writing a book about Rust and Lambda": https://awsbites.com/128-writing-a-bo...


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