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docs: adding clarification to HighNodeUtilization's purpose #592

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8 changes: 5 additions & 3 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -267,9 +267,11 @@ under utilized frequently or for a short period of time. By default, `numberOfNo

### HighNodeUtilization

This strategy finds nodes that are under utilized and evicts pods in the hope that these pods will be scheduled compactly into fewer nodes.
This strategy **must** be used with the
scheduler strategy `MostRequestedPriority`. The parameters of this strategy are configured under `nodeResourceUtilizationThresholds`.
This strategy finds nodes that are under utilized and evicts pods from the nodes in the hope that these pods will be
scheduled compactly into fewer nodes. Used in conjunction with node auto-scaling, this strategy is intended to help
trigger down scaling of under utilized nodes.
This strategy **must** be used with the scheduler strategy `MostRequestedPriority`. The parameters of this strategy are
configured under `nodeResourceUtilizationThresholds`.

The under utilization of nodes is determined by a configurable threshold `thresholds`. The threshold
`thresholds` can be configured for cpu, memory, number of pods, and extended resources in terms of percentage. The percentage is
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