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+---
+pr: 2119
+url: https://github.com/llm-d/llm-d-router/pull/2119
+author: LukeAVanDrie
+date: 2026-07-21
+---
+The fairness_id metric label is now capped at 1000 distinct values; additional fairness IDs are reported under the `other` label value. Flow control metric series for a fairness ID are removed when its flow is garbage collected. This bounds EPP memory and metrics-pipeline load, which were previously unbounded because the label derives from a client-controlled header.