Memory Leaks in Production: Causes, Detection, and Fixes
What a memory leak is, why processes slowly bloat until they crash, how to detect leaks with heap and RSS monitoring, and how to fix them before an OOM restart.
Database Connection Pool Exhaustion: Causes and Fixes
Why apps hit 'too many connections', how connection pool exhaustion happens, and how to diagnose, size, and fix it before it takes your database down.
Kubernetes CrashLoopBackOff: Causes and How to Fix It
What CrashLoopBackOff means, the common reasons a pod keeps restarting, and a step-by-step way to diagnose and fix the crash loop with kubectl.
Kubernetes ImagePullBackOff and ErrImagePull: How to Fix
What ImagePullBackOff and ErrImagePull mean, why Kubernetes can't pull your container image, and how to diagnose and fix the most common causes.
Kubernetes OOMKilled (Exit Code 137): Causes and Fixes
Why Kubernetes kills pods with OOMKilled and exit code 137, how memory requests and limits cause it, and how to diagnose and fix out-of-memory restarts.
Connection Refused vs Reset vs Timed Out: What They Mean
Connection refused, reset, and timed out mean very different things. What each error reveals about where a failure is, and how to monitor and debug them.