Tag: Node.js

All the articles with the tag "Node.js".

• Proper Connection Pool Configuration in TypeORM & NestJS

  15 Jan, 2026

  A deep dive into connection pool configuration in TypeORM and mysql2, inspired by Naver D2's Commons DBCP guide. Learn how to calculate required connections using TPS formulas, compare Before/After production code, and understand each configuration option in depth.

• Debugging a Memory Leak in Browser Automation: The Perfect Storm of Three Cleanup Paths

  8 Jan, 2026

  A deep dive into debugging a memory leak in a production system managing 50 concurrent Firefox browsers. The story of how Promise.race and finally blocks created a double-cleanup bug, and the journey to fix it.