postgres12 min read
Read/Write Splitting in Production — Scaling Reads Without Sharding
Route reads to replicas and writes to primary with lag monitoring, sticky sessions, circuit breakers, and Prisma/Drizzle configuration.
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graphql6 min read
DataLoader and the N+1 Problem — Batching Database Queries in Node.js
Master the N+1 problem with DataLoader. Learn batching strategies, per-request instances, cache management, and production patterns for Node.js APIs.
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backend7 min read
DB Connection Pool Exhaustion — Why Your App Hangs at Peak Load
Connection pool exhaustion is one of the most common and sneakiest production failures. Your app works perfectly at low load, then at 100 concurrent users it freezes completely. No errors — just hanging requests. Here''s the full diagnosis and fix.
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backend7 min read
DDoS vs Legit Traffic Confusion — How to Tell a Viral Moment From an Attack
Traffic spikes 100x in 5 minutes. Is it a DDoS attack, or did you make the front page of Hacker News? The response is completely different. Block the attack too aggressively and you block your most engaged new users. Don''t block fast enough and the attack takes you down.
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backend6 min read
Dead Letter Queue Ignored for Months — The Silent Data Graveyard
Your DLQ has 2 million messages. They''ve been there for 3 months. Nobody noticed. Those are failed orders, unpaid invoices, and unprocessed refunds — silently rotting. Here''s how to build a DLQ strategy that''s actually monitored, alerting, and self-healing.
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