关键词: 即时通讯, 缓存价值, 缓存替换, 时效, 命中率

Abstract: Recently, the function of mobile instant messaging application is becoming more and more complex, meanwhile, the size of data recordings is also becoming bigger and bigger. As a consequence, this situation has brought great pressure to the limited space of mobile terminals. To cope with the above problem, this paper studies and analyzes different user gesture on different parts of the mobile instant messaging application, and then explores the relation between user gesture and the value of cache blocks. This paper also proposes a strategy based on user gesture to manage the cache of mobile instant messaging application accordingly, and points at the value of each block of cache data for user replacing cache blocks. This strategy is capable of adapting to the characteristics of mobile terminals with relatively small memory, low bandwidth and high timeliness requirements of instant messaging software. Through the experiments, the proposed strategy has high hit rate and can hold the cache size of mobile instant messaging application.

Key words: instant messaging, value of cache, replacement of cache, high timeliness, hit rate