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Titel
Difference between the "DBO - Instance Availability" and the "DBO - Usability Availability Single" -
Beschreibung
What is the difference between the following two rules of the DBO Oracle cartridge?
DBO - Instance Availability Rule
DBO - Usability Availability Single RuleThe description from the documentation on when the rules alert is very similar. Both rules are scoped to the DBO_Usability object. The conditions of the rules are different but how does the alerting behavior differ given the conditions?
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Lösung
The DBO - Instance Availability Rule alerts on the percentage of time the instance was down while the DBO - Usability Availability Single Rule alerts when the instance is currently down. The rules are based on the same metric but are used as a thresholds for different components:
DBO - Instance Availability Rule is used for a chart of instance availability on the Homepage, that is why the rule is checking the percent of time in the selected period when the instance was down. The indicator is red is the percent of time is lower than 100%.
DBO - Usability Availability Single Rule is used for alerting that the instance is currently down.
Note: Both rules need the OS collections enabled in the agent and will only fire if the whole instance is shutdown. An Oracle database instance is indicated as being unavailable if the instance’s PMON process (UNIX) or Oracle service (Windows) are not running.