What is an alert buffer, and why should I use one?

Under normal conditions, component levels can fluctuate slightly. If the level is near an alert threshold, these fluctuations may trigger repeated alerts for the same event. 

When a buffer is defined, the component level must reach the buffer level before the alert condition is considered recovered. Another alert can only be triggered if the component level recovers and then reaches the alert condition again. If it stays within the buffer range, a new alert will not be triggered.
 

Example of a buffer on a tank minimum level alert: 

The minimum level alert is set at 30% with a buffer of 5%.

• The tank drops to 29%: an alert is sent
• The tank comes back up to 32%: the alert is still active and not recovered due to the buffer (30% + 5% = 35%)
• The tank drops to 28%: no alert is sent because the alert is not recovered
• The tank comes back to 38%: the alert is considered recovered since it’s above the buffer level of 35%
• The tank drops to 28%: the alert is sent again.