Enterprise Distributed Application Service (EDAS) does not support vertical scale-up of Elastic Compute Service (ECS) instances for ECS applications, for example, from 1 core and 2 GB to 2 cores and 4 GB. You can add ECS instances to achieve scale-up for applications. The scale-up process does not affect the normal running of the existing services. For more information, see Scale out an ECS cluster in the EDAS console.