当通道中没有用户活动数据时将调用清单12。
Listing 12 is called when there is no user activity data on the pipe.
尽管该归档服务器的直接用户活动率很低，但涉及的数据量相当大。
Although direct user activity to this archive server is low, the volume of data involved is fairly large.
收集已触发的个性化规则的数据以及关于用户活动和行为的数据。
Collects data on the personalization rules that are triggered and on user actions and behaviors.
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