https://blog.thalamus.am/tag/linux/Recent content in Linux on ThalamusHugo -- gohugo.ioen-USThalamus TMSat, 08 Aug 2026 00:00:00 +0000https://blog.thalamus.am/posts/df-says-full-du-disagrees/Sat, 08 Aug 2026 00:00:00 +0000https://blog.thalamus.am/posts/df-says-full-du-disagrees/<img src="https://blog.thalamus.am/posts/df-says-full-du-disagrees/editorial-cover.png" alt="Featured image of post df says full, du disagrees" /><p>The third time the compactor volume filled up, I checked what was using the space before making it bigger.</p> <p>The alert was <code>KubePersistentVolumeFillingUp</code>, on the compactor volume of our log store. The first time, we resized the volume. That bought about a month of quiet. It also made the diagnosis feel settled: more logs, not enough disk.</p> <p>Then the alert came back. And came back sooner.</p> <p>This time I opened a shell in the pod and compared two numbers:</p>