Multiple changes to the same object are only recorded once, so the old value remains set at the oldest unchanged value.

对相同数据对象的多次更改将仅记录一次，因此相应的旧值保持为最后一次更改前的值。

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Accordingly, polling collectors typically use sticky tracer types: the APM system reports the value as unchanged in between all polling events. Figure 4 illustrates this pattern.

因而，轮询收集器通常使用粘附跟踪程序类型：apm系统在生成报告时将假定所有轮询事件之间的值不变。

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Note that on new hardware, the method of calculating that value changes; and on existing hardware, the calculation remains unchanged.

请注意，对于新的硬件，计算方法有所改变，而对于现有的硬件，计算方法保存不变。

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Someone who slept through the year could be forgiven for thinking that nothing happened during the time frame since the nearly unchanged value belies a very volatile trading atmosphere.

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The value was unchanged because prices for coffee, cotton, coal and iron ore fell.

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Despite prices becoming discounted, the underlying value remains unchanged.

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