RUNSTATS with system page-level sampling.
带有系统页级抽样的runstats。
Compared with no sampling, page-level sampling significantly improves performance.
与不进行抽样相比,页级抽样极大地提高了性能。
This means that several page-level collections can be regarded as reusable groups under a collection.
这意味着几个页面级集合可以被看作是一个集合下几个可重用的组。
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