The utility of this service can be used for short-term or format business purposes such as product descriptions, website copy, market copy, and sales reports.
The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
，这一点在91视频中也有详细论述
FacebookXLinkedIn。业内人士推荐同城约会作为进阶阅读
3 hours agoShareSave。服务器推荐对此有专业解读
Dr. Becky’s ‘magic potion’