This routine is called twice-before and after mutex acquisition-to determine whether further processing is required based on the time elapsed.

在获取互斥锁之前和之后各调用这个例程一次，从而根据经过的时间决定是否需要进一步处理。

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The primary motivation of execution plans with asynchrony is to reduce elapsed time of federated statements by overlapping processing of remote operations.

含异步的执行计划的主要动机是通过重叠对远程操作的处理，减少联邦语句花费的时间。

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Its primary motivation is to reduce the elapsed time of federated queries by enabling overlapped processing of remote queries that provide data to n-ary operators.

其主要动机是通过允许重叠处理提供数据给n - ary的操作符的远程查询，减少联邦查询所花费的时间。

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