A change summary reduces the overhead of processing a very large amount of information that could be in a business object.

更改摘要可以减少处理业务对象中大量信息的开销。

youdao

Reduce I/O by taking the advantage of indexes, caching, reduced logging overhead, summary tables, and reduced fetches.

通过利用索引、缓存、登录开销的减少、汇总表以及取数据的减少来减少 I/O。

youdao