Tutorials, stack comparisons, tool reviews, and productivity tips — focused on what actually works in production.
Read the blog →You cannot revoke a JWT without a database round-trip, so stop pretending it is stateless. Build a secure session model with short-lived access tokens, httpOnly refresh cookies, rotation, and reuse detection in Node.js.
Your event loop is healthy, CPU is low, and memory is fine, but async file reads and crypto hashes suddenly take five seconds. The libuv thread pool is exhausted, and most Node.js applications run with the default of four threads. Here is how to detect it, fix it, and stop it from happening again.
Logs show one request. Traces show a path. Metrics show the shape of the whole system. Here is the prom-client setup that turns your Node.js service from a black box into a dashboard you can read at 2 a.m., with the four metric types, the Express middleware, and the PromQL queries that actually predict failures.