druid/docs/content/Metrics.md

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Druid Metrics

Druid emits a variety of query, ingestion, and coordination metrics.

Metrics can be displayed in the runtime log file or over http (to a service such as Apache Kafka). Metric emission is disabled by default.

Available Metrics

Please refer to the following spreadsheet for available Druid metrics. In the near future, we will be reworking Druid metrics and fully listing out important metrics to monitor and their expected values.