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Grafana Transformations: Join by Field – Correlate Metrics and Logs in One Panel

Learn how to use Grafana’s Join by Field transformation to merge Prometheus metrics and Loki logs in a single panel, with a concrete example, trade‑offs, and performance tips.

transformations

prometheusTasadduq Burneyowner26.5K rep · 21 Jan 2026, 07:02 UTC