Somewhere in your monitoring right now is an alert that fires regularly and that everyone has learned to ignore. It's not telling you about a problem anymore. It's telling you about a threshold someone set once and never revisited. And every time it fires and nothing bad is happening, it trains your team to trust alerts a little less.
That's the real cost of a noisy alert, and it's worse than it looks. It isn't just the annoyance of another notification. It's that alert fatigue is corrosive. When people are buried under warnings that don't matter, they stop reading them carefully, and eventually the one alert that does matter arrives in the same flood and gets dismissed with all the rest. A monitoring system that cries wolf isn't neutral. It actively makes you slower to respond to the real thing.
I've come to believe every alert should pass a simple test: when this fires, is there something a human needs to do right now? If the answer is no — if the right response is to glance at it and move on, or to silence it, or to wait and see — then it shouldn't be paging anyone. That's not an alert. That's a metric on a dashboard, and it belongs on a dashboard, not in someone's night.
The discipline nobody enjoys is pruning. Going through the alerts that fire often and asking, honestly, whether each one still earns its interruption. Retiring the ones that have become background noise. Tuning the thresholds that were set for a system that has since grown. It feels like housekeeping, which is exactly why it never gets prioritized, and exactly why alert fatigue keeps winning.
An alerting system is only as valuable as the trust your team places in it. Every false alarm spends a little of that trust. So treat a noisy alert as a bug, not a fact of life. Every notification you send should be worth the interruption it causes. When it isn't, you're not being informed. You're being trained to ignore the very system meant to protect you.
– Serguey Shinder
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