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plugin/health: clarify server label (#1707)

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Health overloaded metrics does not carry the server label. Explain why.
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Miek Gieben 2018-04-20 15:03:59 +01:00 • committed by GitHub
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plugin/health/README.md
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@ -60,6 +60,9 @@ If monitoring is enabled (via the *prometheus* directive) then the following met
be a local operation it should be fast. A (large) increases in this duration indicates the
CoreDNS process is having trouble keeping up with its query load.
Note that this metric *does not* have a `server` label, because being overloaded is a symptom of
the running process, *not* a specific server.
## Examples
Run another health endpoint on http://localhost:8091.