Are schedules fixed or based on last run

Elastic Stack Elasticsearch
1

Are watcher schedules guaranteed to run on the time boundary or do they shift based on the duration of the last watcher run?

If I configure the watch to run every 5 seconds and the watch takes 2 seconds to run does it run at: 0s, 5s, 10s, etc.? Or does it run at 0s, 7s, 14s, etc.?

If I configure a watch to run every 5 seconds and the watch takes 10 seconds to run, does it run at: 0s, 5s, 10s, etc.? Or does it run at 0s, 10s, 20s, etc.? Or does it run at 0s, 15s, 30s, etc.?

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Watcher will schedule the watch for execution on the interval you've defined. However the same Watch can only run once, so the execution of a Watch depends on if the previous execution of the same Watch has completed.

Also by default each Watch is throttled for 5s, meaning that if the condition of a Watch matches, the actions will only be executed if the last execution was at least 5s ago. This can be disabled by setting throttle_period on the Watch to 0s.