有两种调度器任务，任务和传感器。

There are two types of scheduler tasks, Task and Sensor.

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有一个名为ph _ threshold的sysadmin表，它用来存储调度器任务的阈值。

There is a sysadmin table called ph_threshold that is used to store thresholds for the scheduler tasks.

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在这种调度器中，调度任务所花费的时间是一个系统中任务个数的函数。

In this type of scheduler, the time it takes to schedule a task is a function of the number of tasks in the system.

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