Why am I getting false alerts?

Diagnose flapping monitors, rotating content, and single-region blips that fire alerts you can ignore.

Quick answer

Most false alerts come from three sources: single-region network blips, flapping monitors, and rotating page content. Lemwatch already filters the first two with confirmation gates and hysteresis — this article helps you tune them.

What causes false alerts

Where to check

Alerts inbox → Suppressed tab shows alerts Lemwatch caught but held back. That's your evidence base.

How to reduce false alerts

  1. Open Alerts inbox → Suppressed and read the top 5 suppression reasons.
  2. If you see "single-region failure" → keep confirmation gates on.
  3. If you see "flapping" → tighten the flap detection window.
  4. For response-time noise → widen the hysteresis band.
  5. For visual noise → follow reducing visual noise.

FAQ

Will these settings make me miss real outages?

No — every setting is a confirmation delay, not a threshold change. A real outage still alerts within 60–120 seconds.

Can I turn all filters off?

Yes, but you'll see 3–5× more alerts. Not recommended.

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