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Languages & runtimes · #nodejs
A hands‑on diagnostic guide to troubleshoot PM2 cluster mode misbehaviors like uneven load, memory restarts, and CPU imbalance. Follow step‑by‑step checks, fixes, and escalation paths to keep Node.js apps running smoothly.
Learn what serializeUser and deserializeUser do, see a working local‑strategy example, and understand why you might keep them when switching to a stateless JWT approach.
Duplicate dependencies in large monorepos can balloon disk usage. pnpm’s content‑addressable store and hard‑link strategy keep a single copy of each package, dramatically reducing disk space and speeding installs. Learn how it works, see a concrete example, and understand the trade‑offs.
Learn how to handle the Cartesian product problem in Sequelize by strategically using 'separate: true' and 'required' to optimize database queries and reduce memory usage.
Learn how to use Mongoose pre and post hooks to centralize data normalization and validation, and avoid the common pitfall of update-method bypassing.
When Mocha reports 'timeout' errors or tests stall, pinpoint the root cause. This guide maps timeout settings and async handling to specific fixes for Node.js suites.
When a Moleculer service fails to start with a transport error, this guide walks through the most common misconfigurations, step‑by‑step checks, and fixes— from missing env vars to broker reachability. It’s a practical diagnostic flow you can run in minutes.
Learn how to implement stable pagination in Knex.js using limit and offset, and why a deterministic order is critical to prevent data drift and duplicates.
Stop database CPU spikes by eliminating N+1 queries in AdonisJS. Learn how to use Lucid's preload method for eager loading, nested relationships, and constrained data retrieval.
pm2
pnpm
sequelize
mongoose
mongodb
mocha
knexjs
adonisjs