9 min read
Database Connection Pooling in Node.js
Why opening a database connection per request is slow, what a connection pool does, how to use one correctly in Node.js, and how to size it.
nodejsdatabasepostgresql
How things actually work under the hood.
Practical engineering writing on how things actually work under the hood — Node.js internals, Linux, databases, and the systems behind production software.
5 min read
How the OS Scheduler Works
Why requests get slow while CPU looks idle, how the OS scheduler shares cores between threads, and the levers you actually control.
operating-systemslinuxcpu
12 min read
How Node.js Garbage Collection Works
How V8 manages memory in Node.js: the heap, generational GC, Scavenge vs Mark-Sweep-Compact, GC pauses, leaks, and when to tune.
nodejsgarbage-collectionv8
6 min read
Graceful Shutdown in Node.js
Stop dropping requests on deploy: handle SIGTERM, drain in-flight work, and close resources cleanly.
nodejsgraceful-shutdowndevops
5 min read
Test Coverage: How Much Is Enough?
What test coverage actually measures in Node.js, and how to pick a threshold that catches bugs without chasing 100%.
nodejstestingtest-coverage
5 min read
How to Scale Node.js Applications Using the Cluster Module
Node.js Performance Guide: Utilizing All CPU Cores with Cluster
software-development
6 min read
From Waterfall to Daily Releases: The 5 Pillars of Modern Software Delivery
A Practical Guide to CI/CD, TDD, and Trunk-Based Development
software-development