Real User Monitoring: What RUM Sees and What It Misses
Real user monitoring times pages inside visitors' browsers. Here is what those APIs report, how much of it never arrives, and why it cannot detect an outage.
#developers
8 posts tagged "Developers".
Rails Health Check: What /up Proves and What It Misses
A rails health check ships with every app since 7.1, but /up only proves the process booted. Here is the second route, and the traps around both.
HTTP Status Codes: Which Ones Should Page You
Most HTTP status codes are noise on a pager. Here is which ones should wake you, which belong in a ticket, and how to assert on them.
Go Health Check: Handler, Context and Drain Window
A go health check is code you write yourself, so the deadline, the dependency list and the drain window are yours to get right. Here is the working shape.
Application Monitoring: Three Vantage Points Explained
Application monitoring runs from three vantage points - inside the process, on the host and out on the internet - and each one is blind where the others see.
API Monitoring Tools in 2026: The Three Families
API monitoring tools come in three families: external checkers, observability platforms and self-hosted probes. Pick the family before the vendor.