Patent ID: 8356208

Claim:
A computer system comprising: a plurality of devices; and a management computer configured to: store, in the management computer, rule information including a first rule indicating a first conclusion that is output when all of a first plurality of events have been detected, and a second rule indicating a second conclusion that is output when all of a second plurality of events have been detected; conduct regular polling of the plurality of devices to obtain information related to the first plurality of events and the second plurality of events; calculate a first ratio based at least in part on events of the first plurality of events that were detected by the regular polling; calculate a second ratio based at least in part on events of the second plurality of events that were detected by the regular polling; and conduct additional polling with respect to at least one of the plurality of devices to obtain one or more undetected events of the first or second plurality of events, based on the first ratio and the second ratio; wherein, if the first ratio is higher than the second ratio, the additional polling with respect to the first plurality of events, instead of the additional polling with respect to the second plurality of events, is conducted.