搜索结果可根据关注者数量排序，所以你可以方便地查看重量级的用户们说了什么，那些无名小卒们又说了什么。
Those results can be sorted by number of followers so you can easily see what the more influential users are saying versus those with more limited social graphs.
因为TPC - H工作负载中表扫描和表排序的数量较多，所以为获得最佳性能将数据从磁盘预取到内存是很重要的。
Because of the number of table scans and table sorts in the TPC-H workload, prefetching data from disks into memory is important for optimal performance.
阈值的显式定义防止数据库管理器将过多数量的内存用于大量排序。
Explicit definition of the threshold prevents the database manager from using excessive amounts of memory for large Numbers of sorts.
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