Reference

5 articles in Reference.

Reference
The ping Command: Reading Every Line of the Output

What every line of ping output means: icmp_seq, ttl, time, packet loss and the rtt min/avg/max/mdev summary, plus the flags Windows and Linux read differently.
25 August 2026
Reference
Service Degradation: What It Means and How to Detect It

Service degradation is partial failure: slow, intermittent or incomplete rather than down. Why up/down checks report it as healthy, and the four signals that actually catch it.
25 August 2026
Reference
High Cardinality: Why Your Metrics Bill Exploded

High cardinality explained: how one label multiplies into millions of time series, what it costs on Grafana Cloud, Datadog and New Relic, and the relabelling and native-histogram fixes that stop it.
25 August 2026
Reference
What Is a Cron Job? The Complete Guide

A cron job runs a command automatically on a schedule. The five-field syntax explained, copy-paste examples, the gotchas that break jobs, and how to know when one stops running.
9 July 2026
Reference
What Does 99.9% Uptime Actually Mean? (The Nines, Explained)

99.9% uptime allows about 43 minutes of downtime a month. Here is what every "nine" means in real minutes, how to calculate uptime, and why 99.99% is far harder.
30 June 2026

Monitor your website, hear about problems first.

2-minute setup · Cancel any time
Create Free Account

Your Dashboard

No credit card needed