Application availability and status
On any given poll, an application’s availability is either 100% or 0% based on the status of the application. Availability is 100% if the application status is available, warning, or critical. For any other status on that poll, SAM marks the availability at 0%.
The status of an application is determined by the worst status of the individual component monitors for that application. For example, if one component for an application is down, then the application is marked as down. If one component is in a warning state and the rest of the components are up, then the application is given a warning status.
With respect to how an application’s availability is calculated over time, SAM aggregates the availability values to Hourly/Daily tables during database maintenance, which is how the average is calculated. Availability for component monitors is calculated in the same way.