The thresholds are defined in a threshold set, which is a list of Periodic Exceptions performance counters.

阈值在一个阈值集中定义，它是一个定期异常(Periodic Exceptions)性能计数器列表。

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Table 1 provides a list of three performance counters and the performance objects under which they are categorized.

表 1 提供了一列三个性能计数器，以及它们所属的性能对象。

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Periodic exception processing alerts (threshold alerts), which are based on operating system and DB2 performance counters

定期异常处理提醒（阈值提醒），基于操作系统和 DB2 性能计数器。

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Many observers have suggested that adding at least three women to any type of team effort improves performance because a non-token number (three) counters group think, one of the greatest obstacles to creativity and innovation.

FORBES: Speak Up! More Women Make Team Smarter