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Post #2720 3.17K
Deep dive into Prometheus’s use-uncached-io work and why page cache behavior can make Kubernetes container memory metrics misleading. Useful for anyone running Prometheus at scale: covers memory predictability, compaction writes, OOM risk, and tradeoffs around direct I/O.

https://prometheus.io/blog/2026/03/05/uncached-io/
prometheus.io Uncached I/O in Prometheus | Prometheus An open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach.
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