🚀 Stack Overflow’s Server Stack — still a performance beast!
(Oddly the page seems to be now deleted but I found it from the archived performance page 📜)
https://web.archive.org/web/20....250222092147/https:/
💡 Key Numbers:
📈 1.3 B page views/month
📦 55 TB data transferred/month
🖥 Web Layer:
9× web servers, each with 64 GB RAM 💪
🗄 Database Powerhouses:
4× SQL Servers → 2 clusters:
Stack Overflow cluster: 1.5 TB RAM, 2.8 TB DB 📊
Other sites cluster: 768 GB RAM, 3.9 TB DB
⚡ Caching:
Redis master + replica, each with 256 GB RAM for lightning-fast responses ⚡🧠
🏷 Tag Engine:
3 servers, 64 GB RAM each, keeping tags ultra-snappy 🏷✨
🔍 Search Layer:
3× Elasticsearch servers, 196 GB RAM each — finding that obscure answer in milliseconds 🔎