METHOD AND SYSTEM FOR MANAGING END-TO-END SERVICE PERFORMANCE BASED ON THRESHOLD, AND NETWORK MANAGER

A method for managing end-to-end service performance based on a threshold is disclosed, including: setting a service threshold performance task and a method for converting the service threshold performance task to a device threshold performance task; during the running process of a system, converting the service threshold performance task to a device threshold performance task, and reporting, by each device, the threshold performance data of the device; calculating service threshold performance data according to the threshold performance data reported by each device; comparing all the threshold performance data related to a service with a set threshold and generating or eliminating an alarm according to the result of the comparison; and distributing all the threshold performance data related to the service to each device for optimization. A corresponding system and a network manager are also disclosed. The disclosure can address the problem that it is difficult to determine the relationship between device performance and service performance, service performance does no accord with the reality and a service performance problem cannot be accurately positioned and realize the automatic optimization of service performance.