StephanEwen commented on issue #9517: [FLINK-13779][metrics] PrometheusPushGatewayReporter support push metrics with groupingKey URL: https://github.com/apache/flink/pull/9517#issuecomment-524825635 @zentol The way I understand this, it is simply some labels that can be attached to any set of metrics that are pushed so that promotheus can internally store the metrics under these group labels. Seems very prometheus specific.
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