icinga2/doc/6.08-check-flapping.md

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Check Flapping

The flapping algorithm used in Icinga 2 does not store the past states but calculcates the flapping threshold from a single value based on counters and half-life values. Icinga 2 compares the value with a single flapping threshold configuration attribute named flapping_threshold.

Note

Flapping must be explicitely enabled setting the Service object attribute enable_flapping = 1.