A delay information output device calculates a first partial correlation coefficient by removing an effect of both the number of calls, per time, of all of requests and the number of delays, per time, of all of requests with a response time that exceeds an allowed time from a correlation coefficient between a first request and a second request. The delay information output device calculates a second partial correlation coefficient by removing an effect of requests that are other than the first request and the second request from the first partial correlation coefficient. The delay information output device determines a set of requests that have the cause-and-effect relationship of a delay on the basis of the second partial correlation coefficient.
DELAY INFORMATION OUTPUT DEVICE, DELAY INFORMATION OUTPUT METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM