CACHE MANAGEMENT APPARATUS, CACHE MANAGEMENT PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To reduce inconsistency between a database and a cache.

SOLUTION: A cache management apparatus stores data IDs and registration date in a database management table 400, and also stores search queries and a search result ID list having data IDs of data included in cache data and generation date of the cache data to a cache management table 500. The apparatus searches for a record corresponding to a search query in the cache management table 500 and acquires a search result ID and the generation date of cache data at the time of search, and searches for a record having a data ID matching each of data IDs in the search result ID list from the database management table 400. The apparatus determines that the cache data corresponding to the search query is valid when the records for all the data IDs in the search result ID list are present in the database management table 400 and the registration dates of all the records are older than the generation date of the cache data.

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