Memory Leak

Go Observability & pprof — Memory Leaks, CPU Profiling & GODEBUG

Prerequisite: This is Part 10 of the System Design Masterclass. Previous parts built the architecture — this part teaches you how to see inside a running system and diagnose production performance issues. Answer-first: Go’s built-in pprof profiler provides CPU sampling, heap allocation analysis, goroutine stack inspection, and blocking profiler — all available as HTTP endpoints in running production services with minimal overhead. Heap diff between two snapshots is the fastest way to identify memory leaks. ...

Goroutine Leak Detection and Fix in Production Go Services

Answer-first: Learn how to detect, diagnose, and fix goroutine leaks in production Go microservices using pprof, goleak, and the new Go 1.26 goroutineleak profile. A Kubernetes pod abruptly restarts with exit code 137. The memory metrics dashboard shows a slow, perfectly linear staircase pattern stretching over three days. There are no panic logs in stdout, no database errors, and no abnormal CPU spikes. Just a slow, silent OOM (Out Of Memory) death. ...