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@ -11,11 +11,6 @@ then generate nice graphs for historical reporting and trending.
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Well-known addons processing Icinga performance data are PNP4Nagios,
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inGraph and Graphite.
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> **Note**
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>
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> As there are no real host checks in Icinga 2, the performance data is
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> generated from the host check service, if existing.
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### <a id="writing-performance-data-files"></a> Writing Performance Data Files
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PNP4Nagios, inGraph and Graphios use performance data collector daemons to fetch
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@ -111,9 +111,9 @@ Schema: "Stats: aggregatefunction aggregateattribute"
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Aggregate Function | Description
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-------------------|--------------
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sum | |
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min | |
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max | |
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sum |
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min |
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max |
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avg | sum / count
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std | standard deviation
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suminv | sum (1 / value)
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