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Merge pull request #2330 from netdata/ingest
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Ingest New Documentation
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ilyam8 authored Feb 7, 2025
2 parents 8e3ea79 + b553701 commit 24d34e6
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13 changes: 5 additions & 8 deletions docs/alerts-&-notifications/alert-configuration-reference.mdx
Original file line number Diff line number Diff line change
Expand Up @@ -788,16 +788,13 @@ warn: $this > (($status >= $WARNING) ? (75) : (85))
crit: $this > (($status == $CRITICAL) ? (85) : (95))
```

| Alert State | Triggers At | Clears At | Explanation |
|-------------|-------------|-----------|---------------------------------------------------------|
| Warning | 85% CPU | 75% CPU | Once in warning state, requires a larger drop to clear |
| Critical | 95% CPU | 85% CPU | Once in critical state, must drop back to warning level |
| Alert State | Triggers At | Clears At | Explanation |
|-------------|-------------|-----------|---------------------------------------------------------------------------|
| Warning | 85% CPU | 75% CPU | Creates a 10% buffer - CPU must drop below 75% to clear a warning state |
| Critical | 95% CPU | 85% CPU | Creates a 10% buffer - CPU must drop below 85% to return to warning state |

This creates a buffer zone that prevents alert flapping. For example:

- If CPU usage bounces between 80–90%, you'll get just one warning (when it first hits 85%)
- The warning won't clear until the CPU drops well below the trigger point (75%)
- The Same principle applies to critical alerts—they won't clear until the CPU drops significantly (85%)
If CPU usage fluctuates between 80–90%, you'll receive just one initial warning, rather than constant notifications.

This approach gives you the best of both worlds: quick alerting when issues arise, but protection against notification spam when values hover near a threshold.

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