| 摘要 |
PROBLEM TO BE SOLVED: To provide a virtual memory management system capable of processing mass data at a high speed. SOLUTION: A data file management information 201 is provided corresponding to each data file, each data file is divided into a plurality of segments, and a segment management information 206 are provided per each segment. A virtual memory space is mapped in segment units, and segments being referred during mapping are registered in a referred segment list 213 and segments not being referred during mapping are registered in an un-referred segment list 214. When mapping new segments in a state with a total number of mappings reaching a predetermined upper limit, new mapping is carried out after un-mapping segments registered in the un-referred segment list 214.
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