express.process.cpu_user_seconds.total

User CPU time

Dimensions:None

Available on:

Prometheus (1)

Interface Metrics (1)

Prometheus

process_cpu_user_seconds_total

Total user CPU time spent in seconds

Dimensions:None

Sources

process_cpu_user_seconds_totalgithub.com

Technical Annotations (18)

Configuration Parameters (2)

exec_moderecommended: cluster

PM2 setting to enable cluster mode in ecosystem.config.js

instancesrecommended: max

PM2 setting for number of worker processes; 'max' auto-detects CPU count

CLI Commands (4)

htopmonitoring

const { Worker } = require('worker_threads'); function runWorker() { return new Promise((resolve, reject) => { const worker = new Worker('./heavy-task.js'); worker.on('message', resolve); worker.on('error', reject); worker.on('exit', code => { if (code !== 0) reject(new Error(`Worker stopped with exit code ${code}`)); }); }); }

remediation

pm2 start npm --name my-app -i max -- startremediation

pm2 scale my-app +3remediation

Technical References (12)

Node.js single threadconceptclusteringconceptworker_threadscomponentWorkercomponentJavaScript threadcomponentCPU profilercomponentPiscinacomponentchild_processcomponentevent-loop utilizationconceptcluster modulecomponentPM2componentSocket.IO cluster adaptercomponent

Related Insights (10)

High CPU usage from inefficient code or resource-intensive operationswarning

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Sustained high CPU usage indicating single-threaded bottleneckwarning

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CPU sustained at 100% with no dips indicates saturationwarning

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CPU-intensive tasks starve event loop requiring worker threadswarning

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Synchronous CPU-intensive operations block event loop and cause latencycritical

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CPU-intensive operations block main event loop threadwarning

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Multi-core CPU underutilized without cluster modewarning

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Event-loop stalls occur without CPU spikeswarning

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Single-threaded Node.js process saturates one core despite multi-core availabilitycritical

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Node.js struggles to use more than 50% of single CPU before event loop laginfo

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