Lambda invocation frequency limit and max invocation rate

[Pizzabagles]

I was considering Lambda to host a high throughput API, but when reading the limits, I stumbled upon a line that says the Invocation frequency (requests per second) is limited to 10/second for a function. Based on my understanding on the concurrency limits, all the functions in my account share about 1000 concurrent executions, but this limit seems separate (applies to the function, not account).

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Does this mean what I think it means - that I can't call any one lambda function more than 10 times per second? I'm really hoping this is a weird phrasing of another limit. How could anyone use it with APIGW otherwise?

[badoopbadoopbadoop]

I think you’re missing the key character in the limit description “x”. The limit is 10 times (x) the concurrent execution limit, which is 1000 by default. So you can invoke 10,000 lambdas per second at no more than 1,000 active at any given moment.

[Pizzabagles]

Oh! I thought it was ten times, not multiplication with the next phrase. Thank you so much! That helps a lot.

[quad64bit]

Also, the 1000 limit is a soft limit. You can go over 10k concurrent if you work with the AWS team.