High P99 request latency indicates broker performance issues

warning

performanceUpdated Dec 19, 2025(via Exa)

Sources

Kafka Metrics Monitoring Guide: Metrics and Best Practicesedgedelta.com

Technologies:

Confluent Platformsubject

Apache KafkaSymptoms of this issue are visible in Apache Kafka metrics and logs

How to detect:

99th percentile request latency exceeds thresholds: >500ms for Produce requests or >1000ms for Fetch requests. This indicates broker performance degradation.

Recommended action:

Check broker health metrics including disk I/O, CPU, memory utilization. Investigate ISR status, rebalancing activity, and network conditions. Review broker logs for errors.