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Export direct_reclaims_total metric to prometheus #227

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Export direct_reclaims_total metric to prometheus #227

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b6ed409
add direct_reclaim metric
Vandit1604 Sep 1, 2024
5b10c07
Update pkg/exporter/exporter.go
Vandit1604 Sep 1, 2024
478dbc3
update metric name in readme
Vandit1604 Oct 17, 2024
2279d65
Merge branch 'master' into feat/export-direct-reclaims-metric-to-prom…
Vandit1604 Oct 17, 2024
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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,8 @@ The exporter collects a number of statistics from the server:
# TYPE memcached_current_connections gauge
# HELP memcached_current_items Current number of items stored by this instance.
# TYPE memcached_current_items gauge
# HELP memcached_direct_reclaims_total Times worker threads had to directly reclaim or evict items.
# TYPE memcached_direct_reclaims_total counter
# HELP memcached_items_evicted_total Total number of valid items removed from cache to free memory for new items.
# TYPE memcached_items_evicted_total counter
# HELP memcached_items_reclaimed_total Total number of times an entry was stored using memory from an expired entry.
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9 changes: 9 additions & 0 deletions pkg/exporter/exporter.go
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Expand Up @@ -78,6 +78,7 @@ type Exporter struct {
lruCrawlerMovesToCold *prometheus.Desc
lruCrawlerMovesToWarm *prometheus.Desc
lruCrawlerMovesWithinLru *prometheus.Desc
directReclaims *prometheus.Desc
malloced *prometheus.Desc
itemsNumber *prometheus.Desc
itemsAge *prometheus.Desc
Expand Down Expand Up @@ -276,6 +277,12 @@ func New(server string, timeout time.Duration, logger *slog.Logger, tlsConfig *t
nil,
nil,
),
directReclaims: prometheus.NewDesc(
prometheus.BuildFQName(Namespace, "", "direct_reclaims_total"),
"Times worker threads had to directly reclaim or evict items.",
nil,
nil,
),
lruCrawlerEnabled: prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystemLruCrawler, "enabled"),
"Whether the LRU crawler is enabled.",
Expand Down Expand Up @@ -704,6 +711,7 @@ func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
ch <- e.lruHotMaxAgeFactor
ch <- e.lruWarmMaxAgeFactor
ch <- e.lruCrawlerStarts
ch <- e.directReclaims
ch <- e.lruCrawlerReclaimed
ch <- e.lruCrawlerItemsChecked
ch <- e.lruCrawlerMovesToCold
Expand Down Expand Up @@ -912,6 +920,7 @@ func (e *Exporter) parseStats(ch chan<- prometheus.Metric, stats map[net.Addr]me
e.parseAndNewMetric(ch, e.itemStoreTooLarge, prometheus.CounterValue, s, "store_too_large"),
e.parseAndNewMetric(ch, e.itemStoreNoMemory, prometheus.CounterValue, s, "store_no_memory"),
e.parseAndNewMetric(ch, e.lruCrawlerStarts, prometheus.CounterValue, s, "lru_crawler_starts"),
e.parseAndNewMetric(ch, e.directReclaims, prometheus.CounterValue, s, "direct_reclaims"),
e.parseAndNewMetric(ch, e.lruCrawlerItemsChecked, prometheus.CounterValue, s, "crawler_items_checked"),
e.parseAndNewMetric(ch, e.lruCrawlerReclaimed, prometheus.CounterValue, s, "crawler_reclaimed"),
e.parseAndNewMetric(ch, e.lruCrawlerMovesToCold, prometheus.CounterValue, s, "moves_to_cold"),
Expand Down