Patent ID: 8654360

Claim:
A management apparatus which manages log information of jobs processed by an image forming apparatus, comprising: a processor coupled to a memory storing program units to be executed by the processor, the program units including: a determination unit, which determines, from a first plurality of logs included in the log information, a second plurality of logs based on information included in the first plurality of logs, wherein the first plurality of logs contain image data corresponding to a first plurality of pages, respectively, and wherein the second plurality of logs contain image data corresponding to a second plurality of pages, respectively, that are collectively similar; a specification unit, which specifies, based on a determination result determined by the determination unit: a third plurality of logs as a first group job, the third plurality of logs corresponding to a third plurality of pages, respectively, and a fourth plurality of logs as a second group job, the fourth plurality of logs corresponding to a fourth plurality of pages, respectively, wherein the fourth plurality of pages are similar to the third plurality of pages, respectively, wherein the second group job succeeds the first group job, and wherein the third plurality of logs and the fourth plurality of logs each include at least one log of the second plurality of logs; a difference log generation unit, which generates, as difference logs between logs of corresponding pages, differences between (1) logs from a first page to a last page of the third plurality of pages and (2) logs from a first page to a last page of the fourth plurality of pages, page by page; a receiving unit, which receives, from the image forming apparatus, a notification representing that more than a predetermined number of jobs have been received in a period of time defined in advance; and a change unit, which changes, based on the notification received by said receiving unit, an interval of receiving the log information from the image forming apparatus of a notification source to a shorter interval, wherein the image forming apparatus determines the second plurality of logs based on attribute information of the more than the predetermined number of jobs received in the period of time, and sends the notification including a result of the determining by said image forming apparatus to said management apparatus, and wherein said difference log generation unit generates the difference logs from information included in the second plurality of logs based on the result included in the notification received by said receiving unit.