AWS Lambda concurrent request limit and how to increase that?

Question

I want 10 million requests handle concurrently.Does AWS lambda is capable of that as they mentioned only 100 concurrent request as AWS lambda Limits?

Answer 1

Inside the AWS Console navigate to the Support Center. Here you can create a Service Limit Increase for AWS Lambda concurrent executions.

However I don't think they will instantly raise your limit that high. Last time I requested an increase from 100 to 5000 it took some discussion and they wanted the following information:

• Expected average requests per second
• Expected peak requests per second
• Expected function duration
• Function memory size
• Invocation Type
• Event Source (If Applicable)

In the end we agreed on 2000, which was fine for my usecase. But they definitely don't blindly accept any request because of course they need to make sure that the requested resources are available at any time.

The support mostly answers within 24h, so if you are lucky the raise may take place in 1-2 days. In my case it took 5-6 days because of the discussion.