| 摘要 |
<p>Historical log data for a plurality of databases (419a, 419b) are classified for the individual databases. Alternatively, the historical log data associated with the database and user log data are classified. The classified log data are stored in a plurality of nonvolatile buffers (414a, 414b). When the nonvolatile buffers are full in storing, the contents of the nonvolatile buffers are temporarily written into historical log files (418a, 418b), following which the classified log data are stored in the nonvolatile buffers. <IMAGE></p> |
