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#oomkilled

2 stories

Banner: Kubernetes container requests and limits, CPU throttling and memory OOM kills

Cloud & Infrastructure

Kubernetes requests and limits: a practical guide to QoS, throttling and OOM

Daniel Tran · Sep 16, 2025 · 9 min read

Requests decide where a pod is scheduled and how much CPU it is guaranteed; limits decide when it is throttled or killed. This guide explains QoS classes, CFS throttling and OOM kills, and shows how we size containers from real metrics with HPA and VPA.

Banner: a Kubernetes pod whose Node.js heap grows past the container memory limit and is killed

Cloud & Infrastructure Bug Report

Kubernetes CrashLoopBackOff with OOMKilled exit code 137: Node heap set above the container limit

Daniel Tran · Dec 12, 2024 · 9 min read

Our storefront BFF pods restarted every few hours with OOMKilled and exit code 137, then fell into CrashLoopBackOff during the holiday peak. A max-old-space-size inherited from the VM days was double the container memory limit. Sizing the heap to the limit and bounding a cache fixed it.