Monitoring bash Advanced

Node.js Heap Snapshot via CLI

Trigger and download a V8 heap snapshot from a running Node.js process.

bash 
#!/bin/bash
PID=$1
NODE_INSPECT_PORT=9229

kill -USR1 $PID
echo Waiting for inspector...
sleep 2

curl -s "http://localhost:$NODE_INSPECT_PORT/json" | jq -r ".[0].webSocketDebuggerUrl"

# Or use clinic.js for automated heap analysis:
# npx clinic heap -- node server.js

Prerequisites

  • Node.js >= 16
  • curl
  • jq

Pro Tips

  • → Open the .heapsnapshot in Chrome DevTools Memory tab.

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Commercial Licensing

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Module Info

Language
bash
Level
Advanced
Read time
3 min
Published
Feb 2026
License
Commercial License

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