How Devices Availability/Uptime Report is calculated?

Uptime/Availability is the duration that a particular device was up and operational. To understand how this is calculated, read below.

Polling interval

Polling interval for availability, (i.e) the specific interval that we monitor whether a device is up or down is 15 minutes. 

The number of polls per hour = 4

The number of polls per day = 96

Device availability calculation:

Per Hour availability = Seconds_in_hour - (sum (in seconds) of all other states)
Per Day availability = Seconds_in_Day - (sum (in seconds) of all other states)

Note: On Hold, Maintenance, Dependent Unavailable, Down, Not Monitored is calculated as Device Down duration.

NOTE: Time will be stored in seconds for both hourly and daily calculation.
3600 s = 1 hour
86400 s = 24 hours

ElementAvailabilityHourly for devices

Uptime = 3600 - (sum of all other states).

For reports :

Availability Percentage = (1-( (sum of Down and Dependent Unavailable ) / (sum of Down, Dependent Unavailable, Uptime))) * 100

Down percentage = 100 - availability percentage

ElementAvailabilityDaily for devices

Uptime = 86400 - (sum of all other states).

For reports :

Availability Percentage = (1- ((sum of Down and Dependent Unavailable ) / (sum of Down, Dependent Unavailable, Uptime))) * 100

Down percentage = 100 - availability percentage

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