You can specify the following parameters for Availability metrics:
Define the time interval (in minutes, hours, or days) at which a Simple Diagnostics Agent measures the metric. For example, if you set a collection frequency of one minute, the Simple Diagnostics Agent measures the metric once each minute.
A threshold defines when a metric receives a certain status, such as OK (green) or Critical (red). Availability metrics have four key performance indicators (KPIs). A threshold is available for each of these KPIs.
Collection Frequency: 1 minute
Response Time: on
The metric status is set to yellow if the response time is greater than or equal to 2000 milliseconds but less than 4000 milliseconds 10 consecutive times. (10 = Delay/Collection Frequency)
The metric status is set to red if the response time is greater than or equal to 4000 milliseconds 10 consecutive times. (10 = Delay/Collection Frequency)
How is the metric status calculated when one or multiple thresholds are switched on?
The metric status is calculated according to the worst-case principle: If at least one of the activated thresholds or the Rating threshold returns red, the metric status is set to red.
If neither an activated threshold nor the Rating threshold returns red, but at least one of these thresholds returns yellow, the metric status is set to yellow.
If all activated thresholds and the Rating threshold return green, the metric status is set to green.
If you don't maintain a threshold for a metric, an alert is generated when the metric status is set to red by the Health Monitoring app. If you maintain a threshold for a metric, an alert is generated when the defined threshold is reached. Alerts are displayed in the Health Monitoring and Alert Management applications.
The following alert settings are available:
Availability Alerts Generated from Availability Metrics
Availability alerts can be generated from Availability (HTTP Availability, RFC Availability, and TCP Availability). A metric is reported to Service Availability Management as an unplanned outage if the following prerequisites are met:
An active service definition has been created for the technical system in Service Availability Management as explained here.