| 摘要 |
When an approximation formula indicating the relationship between data and the clock time is calculated in a stream data analysis process, there is a possibility that a digit overflow may occur. To address this problem, a stream data processing server, which processes stream data that arrives continuously from a computer system that is being monitored, is equipped with a stream data processing unit that extracts data from the stream data using a sliding window and performs an analysis process. The stream data processing unit is equipped with an approximation formula calculation unit that calculates an approximation formula indicating the correspondence relationship between time stamps and data values. The approximation formula calculation unit sets any of the time stamps for the extracted data as the origin for the clock time, revises the time stamps to the relative clock time value from the starting point of the clock time that has been set, and calculates the approximation formula using the revised time stamps and the data values. |
