Metric Heatmap IO Usage Metric and hi-low settings

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Teradata Employee

Metric Heatmap IO Usage Metric and hi-low settings

anyone have recommendations on metric to use and value settings for a 2800 appliance. I see the metric, Disk Usage on pg.249 of VP User Guide is displaying as a % .  What source is this metric derived from and how would I determine what min/max threshholds to set for a  2800 node?

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