Health can be impacted by a variety of metrics. They are primarily taken from performance counters or events.
Health is impacted by Windows events if the following are both true:
An alarm was triggered by the event
The level of the event is Error, Warning, or Critical
The health score is written to the database in:
Ten one-minute intervals, which reset after each 10-minute write to the database.
Each one-minute interval includes metrics that affect the health of a system.
When we check non-event based health values, we check the output of the performance counters. Those checks run every 15 seconds. The value we get is the average of the last 15 seconds.
EXAMPLE: To affect the health score, the average CPU usage for a 15-second interval must be greater than 20%. If the CPU usage spikes to 90% for 1 second, but stays low at 1% for 14 seconds, then the average CPU usage would only be 7%. In this example, there is no health impact.