yuecong commented on issue #26060: [SPARK-29400][CORE] Improve PrometheusResource to use labels URL: https://github.com/apache/spark/pull/26060#issuecomment-539819286 > BTW, the following cover some gigantic clusters, but not all cases. There is a different and cheaper approach like `Federation`. We are using `Federation` which fits our environment much better. Would like to hear more about this. Our experience on Federation is that if we do not filter our some metrics but just federate metrics from each child server, the Federation prom will become the bottleneck. how many metrics you have for your Federation prom ?
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