Скачать или смотреть Node Js Interview Question and Answer - Heavy Traffic on Server | Final Round Question

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You’re running a Node.js server, and suddenly traffic spikes by 5× 🚨. The server slows down and requests start timing out 😓. What should you do immediately, and what long-term steps will keep the system stable if high load continues?

👉 Short-term fixes:
✅ Rate limiting – block extra requests to avoid overload.
✅ Caching – serve frequently requested data faster.
✅ Disable heavy features – pause reports/exports temporarily.
✅ Queueing – push non-critical tasks to background jobs.

👉 Long-term solutions:
✅ Horizontal scaling – run multiple servers behind a load balancer.
✅ Database optimization – improve queries, add indexes, use Redis cache.
✅ Auto-scaling – add servers automatically in the cloud when demand rises.
✅ Monitoring – track logs/metrics with Prometheus or Datadog to catch bottlenecks.

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🚀 This is how you keep your Node.js server alive during sudden traffic spikes!

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