关键词: 分布式系统, 性能瓶颈, 自适应遗传算法, 关键性能指标, 适应度函数

Abstract: Distributed software’s run-time performance is vary largely by such factor as multi-user environment, the topology structure and parallel operations besides it is difficult to find out the system’s deficit. Aiming at the problem, this paper presents an adaptive Genetic Algorithm(GA). It adopts the method that to increase the load gradually, according to the response time check which parts in the system occurs performance problem, then forms the chromosome by using the collected key performance index value. The fitness function is created based on the fact that along with the vary of multiple indexes which affects the response time differently, and do inherit and mutation operation to find out the factor. Experimental result shows that this algorithm can accurately find out the system performance bottleneck resources.

Key words: distributed system, performance bottleneck, adaptive Genetic Algorithm(GA), key performance index, fitness function