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The formulas used for calculation of the reporting conditions can be tuned and adjusted by the user.
The formulas as well as more information can be found here: Node Health Report
The section opreports_rules (in conf/opCommon.nmis in opReports 3.x, or opReports.nmis in version 2.x) defines the threshold values for the following conditions:
Device Availability = Condition: "Device has LOW or VERY LOW availability"
Action: Investigate causes for low availability
Formula used for Calculation:
- Very Low device availability less than 99.9
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Interface Availability = Condition: "Device has LOW or VERY LOW interface availability"
Action: Investigate causes for low interface availability
Formula used for Calculation:
- Very Low interface availability less than 80
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CPU Utilisation = Condition: "Device has VERY HIGH, HIGH or MODERATE CPU utilisation"
Action: Investigate causes for CPU utilisation
Formula used for Calculation:
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- High CPU utilisation: greater than 20%
- Moderate CPU utilisation: greater than 12%
If the node has multiple CPUs then the utilisation measure is averaged over all CPUs.
CPU Exceptions
The count of times the CPU utilisation exceeded the "CPU Exception Threshold" of 20%. If the node has multiple CPUs then this is the sum of the exception counts of all CPUs.
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- Very Low free main memory less than 10
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IO or Virtual Memory Utilisation = Condition: "Device has VERY LOW or LOW IO or Virtual memory free"
Action: Investigate causes for low free IO or Virtual memory
Formula used for Calculation:
- Very Low free main memory less than 10
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WAN Report
The WAN report displays the WAN Link performance for selected nodes. As of version 3.0.4, selection by interface is not supported and all interfaces of selected nodes whose network type is "wan" are processed.
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