• Synthetic Classic
  • Private Last Mile
  • Mobile

I have set up Private Last Mile/Mobile alerts. But the Improved alert is an hour late after the site back up.


Even thought an Improved alert may appear to be late, it is working as designed. Private Last Mile and Mobile have longer test frequency than Backbone tests.

Root Cause

The Alert is configured to trigger when the test performance meets the conditions set up. The condition is based on how test is performing for one test cycle, a.k.a test frequency. Unlike Backbone tests, the Private Last Mile/ Mobile tests are built with fixed frequency of an hour. To trigger an Improved alert, the test needs to run in "good" status for an hour.