Research on the Role of Cache and Its Control Policies in Software Application Level Optimization

Cache becomes very important in high-load computer application. In a web application, cache can improve the performance of application by several orders of magnitude generally. The article analyzes the role of cache in software application level optimization in detail and divides cache into local cache, local sharedmemory cache, distributed memory cache, disk cache. Several cache control policies including alive time, invalid in writing, invalid in reading et.al are studied and the problems when using cache in applications are pointed out.Key words: Software application level; Cache; Optimization; Cache control policie