| 摘要 |
PROBLEM TO BE SOLVED: To effectively use cache by appropriately deleting data from the cache according to a use condition of the data.SOLUTION: An application server 1 comprises: cache storage means 14 which stores data; priority control means 13 which controls priority of each piece of data stored in the cache storage means 14; and deletion means 12 which sequentially deletes pieces of data in low priority order, when there is no sufficient capacity in the cache storage means 14. The priority control means 13 degrades the priority of pieces of data stored in the cache storage means 14 according to elapse of time, while increases the priority of data when the data is accessed. |
