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mapper cache: Add cache metrics for total gets and hits

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Add metrics to record mapper cache hits and total gets.

Signed-off-by: bakins <brian@akins.org>
This commit is contained in:
bakins 2020-01-02 10:06:04 -05:00
parent 2e3d3ab962
commit 4b69da2d03
1 changed files with 16 additions and 0 deletions
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16
pkg/mapper/mapper_cache.go
View file

@ -25,6 +25,18 @@ var (
Help: "The count of unique metrics currently cached.", Help: "The count of unique metrics currently cached.",
}, },
) )
cacheGetsTotal = prometheus.NewCounter(
prometheus.CounterOpts{
Name: "mapping_cache_gets_total",
Help: "The count of total cache gets.",
},
)
cacheHitsTotal = prometheus.NewCounter(
prometheus.CounterOpts{
Name: "mapping_cache_hits_total",
Help: "The count of total cache hits.",
},
)
) )
type MetricMapperCacheResult struct { type MetricMapperCacheResult struct {
@ -58,7 +70,9 @@ func NewMetricMapperCache(size int) (*MetricMapperLRUCache, error) {
} }
func (m *MetricMapperLRUCache) Get(metricString string, metricType MetricType) (*MetricMapperCacheResult, bool) { func (m *MetricMapperLRUCache) Get(metricString string, metricType MetricType) (*MetricMapperCacheResult, bool) {
cacheGetsTotal.Inc()
if result, ok := m.cache.Get(formatKey(metricString, metricType)); ok { if result, ok := m.cache.Get(formatKey(metricString, metricType)); ok {
cacheHitsTotal.Inc()
return result.(*MetricMapperCacheResult), true return result.(*MetricMapperCacheResult), true
} else { } else {
return nil, false return nil, false
@ -102,4 +116,6 @@ func (m *MetricMapperNoopCache) AddMiss(metricString string, metricType MetricTy
func init() { func init() {
prometheus.MustRegister(cacheLength) prometheus.MustRegister(cacheLength)
prometheus.MustRegister(cacheGetsTotal)
prometheus.MustRegister(cacheHitsTotal)
} }