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Add metrics for cache hits/misses (#375)

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* Add metrics for cache hits/misses

Add counters for cache middleware hits and misses.

* Add test for cache middleware hit/miss counters.

* Fix cache hit metric incrementing.

* Add cache hit/miss metrics to dnssec middleware.

* Update README metric documentation.
This commit is contained in:
Ben Kochie 2016-10-31 19:50:50 +01:00 • committed by Miek Gieben
parent 27d893cf33
commit 775d26c5e2
6 changed files with 63 additions and 6 deletions
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16
middleware/dnssec/handler.go
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@ -53,6 +53,20 @@ var (
Name: "cache_capacity",
Help: "The dnssec cache's capacity.",
}, []string{"type"})
cacheHits = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: middleware.Namespace,
Subsystem: subsystem,
Name: "cache_hits_total",
Help: "The count of cache hits.",
})
cacheMisses = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: middleware.Namespace,
Subsystem: subsystem,
Name: "cache_misses_total",
Help: "The count of cache misses.",
})
)
// Name implements the Handler interface.
@ -63,4 +77,6 @@ const subsystem = "dnssec"
func init() {
prometheus.MustRegister(cacheSize)
prometheus.MustRegister(cacheCapacity)
prometheus.MustRegister(cacheHits)
prometheus.MustRegister(cacheMisses)
}