论述了各区的采样对象及采样点密度。
Sampling objects and sampling densities in different areas are discussed.
举个例子，你可以创建几个采样对象使用不同的采样状态组合。
For example, you could create several sampler objects with various sampler-state combinations.
扩展的统计信息是使用采样在MQT定义中引用的对象上收集得到的。
Extended statistics are collected on objects referenced in the MQT definition using sampling.
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