DELAY CAUSE IDENTIFICATION METHOD, DELAY CAUSE IDENTIFICATION PROGRAM, DELAY CAUSE IDENTIFICATION APPARATUS

A delay cause identification method includes calculating a statistical value of a processing time of a call source workload for each of paths from the call source workload corresponding to a call source microservice to a plurality of call destination workloads corresponding to a call destination microservice, and determining that a network related to the call destination microservice or the call destination microservice is a cause of a delay, when the first condition which there exists, based on the statistical value, a call destination workload common to paths involving a first processing time of the call source microservice among the paths and the second condition which a first difference and a second difference are within a predetermined range are satisfied, the first difference being a difference in a first average value of the processing time, the second difference being difference in a second average value of a response time.