https://plumephp.com/tags/high-cardinality/Recent content in High-Cardinality on PlumePHPHugozh-CNSun, 27 Sep 2026 11:30:00 +0800https://plumephp.com/prometheus-high-cardinality-optimization/Sun, 27 Sep 2026 11:30:00 +0800https://plumephp.com/prometheus-high-cardinality-optimization/<p>Prometheus 的标签系统强大而危险：<strong>标签值每多一种组合，时间序列就翻一倍</strong>。一旦把 <code>user_id</code>、<code>request_id</code>、<code>pod</code> 这种高基数标签塞进指标，序列数指数级爆炸——存储撑爆、查询变慢、告警失效。本指南讲透高基数的机理、标签设计纪律，以及 PromQL 查询与存储的优化手法，让监控在规模增长时依然快而稳定。</p>