🚀 Faced This in an Interview — Microservice Performance Issues (Amazon Example) Interviewer: "In a large e-commerce platform like Amazon, what kind of performance issues could happen at the microservice level? And how would you solve them?" Me (thinking): "Performance issues? You mean like the time my cart took longer to load than my mom deciding what to order at Amazon Pantry? 😅" 🛒 The Amazon Microservice Setup User Service → Authentication Product Service → Show available products Cart Service → Manage your cart Order Service → Process payment & order Inventory Service → Update stock after purchase All of these talk to each other over REST APIs or gRPC. 💥 The Performance Problem Scenario: Big Diwali Sale 🎇 — millions of requests per minute. Suddenly the Order Service takes 3 seconds instead of 200ms . Customers refresh → double load → 💣 disaster. Possible Causes: 🔗 Service Chaining Latency — One slow API (like Inv...
A cozy space where I share my daily Java learnings, issues, and solutions.