Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
有一个数据库记录。该记录有一个网页。此网页已缓存。在某些时候,记录可能会更新并且(网页的)缓存 - 不再需要。
系统应该立即告诉缓存不再需要它,还是应该在(且仅当)请求缓存的网页时发生这种情况,以防止潜在的不必要的删除?