| 摘要 |
An operating system (OS-A (20)) comprising an NE-A performance information gathering unit (112), an NE-B performance information gathering unit (113) and an NE-C performance information gathering unit (114) that transmit at a specified cycle a performance information acquisition request to transmission devices (30, 31, 32) and gather performance information, a performance information storing unit (115) for storing gathered performance information, and a performance information gathering function control unit that allows, when the OS-A (20) is under a high performance information gathering load, a high-level OS (10) connected to a monitoring network (50) to acquire information in an OS-B (21) under a low performance information gathering load and moves an NE-C performance information gathering unit (114) to the OS-B (21).
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