問題文
The documented recommendation is that when a detector is created from a chart, the data should be viewed at its native resolution first. Why does this matter?
選択肢
- The native resolution is the only resolution at which the metric type is visible in the chart, and the metric type is what the detector needs in order to decide which rollup to compare against.
- Detectors can only be created from charts whose resolution matches the native resolution of the signal, so a coarse chart makes the bell icon unavailable and the engineer cannot proceed at all, which turns the recommendation into a matter of access rather than of judgment.
- A coarse chart resolution summarizes the data, so peaks and dips average out and the threshold chosen from that view does not reflect what the detector actually evaluates; analytics are also applied to the summarized data, which can change the meaning of a calculation, because the functions run on what the chart condensed.
- Charts at coarse resolutions are rendered from a cached copy that can be up to one day old, so the engineer might be looking at yesterday's data while believing it is current and would then pick a threshold from stale values.