I want to reduce the amount of data of performance data to be transmitted. Performance data collection means (1b) collects performance measurement unit (3) the performance data of the CPU to be managed. Are classified into the same group the CPU to compare the performance data collected, to approximate the performance data, grouping means (1c) determines the representative CPU for each group. Performance data transmission means (1d), and transmits the performance data collected performance data management device for managing and storing the performance data to (2). In this case, it is possible to transmit a transmission interval of the prescribed performance data representative of the CPU group, and transmits a transmission interval longer than the transmission interval of the prescribed performance of the CPU data in the other.
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