Methods, systems, and computer-readable storage media for determining a sub-set of services, each service in the sub-set of services being in an overload status and having a SSF associated therewith, providing statistics associated with each service in the sub-set of services and relating service call statistics to each API group of a set of API groups, determining a set of sessions based on the service call statistics, each session in the set of sessions associated with at least one service in the sub-set of services having a service call statistic that exceeds a threshold service call statistic, defining an execution group and a waiting group, determining that a session is in the waiting group, and in response, blocking a request of the session from being processed by a service in the sub-set of services, and providing a wait indication to a user associated with the session.