Currently, as the doc mentioned, the job maximum runtime is 5 hours, and no option to change it.https://circleci.com/docs/2.0/configuration-reference/#jobs> Jobs have a maximum runtime of 5 hours.Server customers, especially static install, they don't need to care about the price of the time of running instances. And some machine learning builds need more than 5 hours.
CCI-I-1436