'No Space Left on Device' with 40% Disk Free: The Inode and OverlayFS Death Spiral
df -h shows 40% free. But your container keeps crashing with ENOSPC. The culprit: inode exhaustion on overlayfs layers, invisible to standard monitoring.
#containers
5 posts
Kubernetes OOM Killer: Why Your Container Dies at 50% Memory
Container memory limit is 4GB but OOM kills at 2GB used. Kernel buffers, page cache, and cgroup accounting tricks cause early OOMKills. Here's the full picture.
Go GOMAXPROCS in Containers: The CPU Detection Problem
Go sees 64 host CPUs but your container has 2 CPU limit. GOMAXPROCS=64 causes excessive context switching and throttling. Here's the fix.
Python GIL and Kubernetes CPU Limits: The Threading Trap
Your Python app has 4 threads but K8s gives 1 CPU. GIL + CFS quota = severe throttling. I show why and how to configure workers correctly.
Linux Page Cache Thrashing in Containers: When Free Memory Isn't Free
Your container has 2GB free but runs slow. Page cache counts against memory limit. File I/O forces code pages out. I explain with benchmarks and solutions.