Dive into Node.js 20's container-aware memory management. Understand default heap sizing, how to override it, and troubleshooting memory leaks.

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Node.js 20+ automatically adjusts heap size based on container memory limits through cgroup awareness. By default, heap size is 50% of container memory up to 4 Gi, maxing out at 2 GB. The --max-old-space-size flag can override these defaults. The article explains V8 garbage collection behavior, troubleshooting memory leaks, and deployment considerations for OpenShift/Kubernetes environments. Key insight: simply increasing heap size won't fix underlying memory leaks, as OutOfMemory exceptions will eventually occur regardless.

Node.js 20+ memory management in containers