Aikesheng Open Source Community

Oct 10, 2025 · Operations

Why Docker Exec Fails with OOM on a Host with 2 GB Free? Diagnose and Fix vm.min_free_kbytes

This article explains why a Docker container reports an out‑of‑memory error even though the host shows over 2 GB of free memory, analyzes the discrepancy between MemFree and MemAvailable, examines Linux memory watermarks, and provides a step‑by‑step solution by adjusting vm.min_free_kbytes.