Tutorials, stack comparisons, tool reviews, and productivity tips — code that ships.
Your p99 latency spikes every few minutes and they align perfectly with garbage collection pauses. Adding RAM does not help. Here is how V8s generational GC actually works, which flags change its behavior, and the monitoring setup that tells you if the tuning worked.
Your memory stays flat but connection count climbs until new clients get refused. The culprit is almost never a leak. It is a slow client holding a socket forever because Node.js server defaults assume everyone plays nice. Here are the three timeout values that turn a slowloris attack or a runaway upload into a fast error, with the 40-line production config and the test that proves it works.
Your time-series table has a billion rows and a 4 GB B-tree index on timestamp. Insertions slow down, autovacuum chokes, and disk space disappears. BRIN indexes cover the same queries in 40 MB by exploiting the natural order of append-only data. Here is when they work, when they do not, and the exact DDL to deploy them safely.
Your product team wants an audit trail, replayable history, and the ability to rebuild read models without running migrations on a 500GB table. Here is how to implement event sourcing in PostgreSQL without Kafka, schema registries, or six months of migration pain: just an append-only table, a projection function, and the replay logic that makes it useful.
You are running an 8-core server and Node.js uses one. Here is the cluster module wiring (shared-nothing workers, externalized state, and graceful shutdown) that turns unused silicon into HTTP throughput without touching Kubernetes.
Your users table has 10 million rows but only 200,000 are active. Every lookup scans the deleted ones too. Here is how partial indexes shrink your indexes by 90%, speed up hot queries, and the three mistakes that make them silently stop working.
When a hot cache key expires, a thousand concurrent requests can hammer the same database query. The singleflight pattern collapses those into a single backend call. Here is a production-grade TypeScript implementation, the edge cases that break naive versions, and the one-line integration that makes it cache-aware.
A production incident walkthrough: Node.js connection pools silently fill with dead TCP sockets, every outbound request hangs forever, and your service looks down while the downstream API is healthy. Here are the four timeout values (connect, response, idle, and keepalive) with the working Agent and fetch config that prevents it.
A single slow report endpoint consumed every connection in the pool, and your login API started timing out. Here is how the bulkhead pattern isolates failure domains in Node.js: with semaphores, separate pools, and the fast-fail logic that keeps the rest of your service alive.
Stop drilling requestId and logger objects through twelve layers of function signatures. Here is how to use Node.js AsyncLocalStorage to attach context to the async chain itself, with working Express middleware, auto-enriched logging, and the three pitfalls that break context in production.