Computer system management based on request count change parameter indicating change in number of requests processed by computer system

摘要

A resource usage analysis tool (23) calculates a number-of-requests variation parameter indicating the variation of the number of processed requests and a resource variation parameter indicating the usage rate and/or variation of the usage amount of the resource of the computer system from a request classification log (31) in which the number of requests processed by the computer system in each measurement period is described and system logs (32 to 34) in which the usage of the resource of the computer system in each of the measurement periods is described. An asynchronous processing detecting module (51) detects at least one occurrence of a post-processing which is a processing to be performed after the return of a response in order for the computer system to process the requests and an unexpected processing which is a processing to be performed independently of the processing of the requests but not to be performed routinely from the number-of-requests variation parameter and the resource variation parameter.