Will t2small instance type on Amazon upscale if more resources are needed?
T2small instance type will use more resources according to its earned CPU credits. More information about this feature could be found in the following article in Amazon User Guide: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/t2-instances.html
If the performance of the selected instance type is not enough, it could be changed to a larger t2 instance of any other type of instance with fixed high performance. More information about instance type of Amazon Web Services, requirements for it and way to change it could be found in the following articles: