What's the maximum number of virtual processor cores available in AWS Lambda?

Question

I\'m trying to find the maximum number of virtual processor cores available in AWS Lambda. The official documentation implies that it scales with the amount of configured me

Answer 1

While AWS till today didn't disclose any details regarding processing power of AWS Lambda functions, they now did after announcing an increase of the maximum memory from 1536 MB to 3008 MB. Their documentation now states:

Functions larger than 1536MB are allocated multiple CPU threads, and multi-threaded or multi-process code is needed to take advantage of the additional performance.

Based on that, we can conclude that all AWS Lambda functions up to 1536 MB of memory have a single virtual processor core available, while functions with more memory have two cores available.

Update:

While that part of the documentation isn't available anymore, Chris Munns from AWS recently at the AWS Serverless Startup Day on 2018-07-10 disclosed that all AWS Lambda functions with more than 1.8GB of memory are running on multiple cores. So apparently the boundary between single-core and multi-core for AWS Lambda functions moved from 1.5GB to 1.8GB.