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README: add resource recommendation #196

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Aug 1, 2017
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README: add resource recommendation #196

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14 changes: 14 additions & 0 deletions README.md
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Expand Up @@ -37,6 +37,20 @@ additional metrics!

See the [`Documentation`](Documentation) directory for documentation of the exposed metrics.

## Resource recommendation

Resource usage changes with the size of the cluster. As a general rule, you should allocate

* 200MiB memory
* 0.1 cores

For clusters of more than 100 nodes, allocate at least

* 2MiB memory per node
* 0.001 cores per node

These numbers are based on [scalability tests](https://github.com/kubernetes/kube-state-metrics/issues/124#issuecomment-318394185) at 30 pods per node.

## kube-state-metrics vs. Heapster

[Heapster](https://github.com/kubernetes/heapster) is a project which fetches
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