MANAGEMENT COMPUTER AND PERFORMANCE DEGRADATION SIGN DETECTION METHOD

A management computer detecting signs of performance degradation even when virtual computing units are generated and destroyed repeatedly over a short period of time. The management computer manages an information system including one or more computers and one or more virtual computing units virtually implemented on the one or more computers, while detecting signs of degradation of the performance. The management computer acquires operating information from all virtual computing units belonging to one or more autoscaling groups, which generates from the operating information, reference values, each of which is used for detecting signs of degradation of the performance of one of the one or more autoscaling groups, and detects signs of degradation of the performance in each autoscaling group using both the reference values generated and the operating information about the virtual computing units as acquired.