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Scraping: add metric for symbol table size

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Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This commit is contained in:
Bryan Boreham 2024-04-02 14:56:19 +01:00
parent 709c5d6fc3
commit 7ca31c66be
2 changed files with 12 additions and 0 deletions
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10
scrape/metrics.go
View file

@ -34,6 +34,7 @@ type scrapeMetrics struct {
targetScrapePoolExceededTargetLimit prometheus.Counter
targetScrapePoolTargetLimit *prometheus.GaugeVec
targetScrapePoolTargetsAdded *prometheus.GaugeVec
targetScrapePoolSymbolTableItems *prometheus.GaugeVec
targetSyncIntervalLength *prometheus.SummaryVec
targetSyncFailed *prometheus.CounterVec
@ -129,6 +130,13 @@ func newScrapeMetrics(reg prometheus.Registerer) (*scrapeMetrics, error) {
},
[]string{"scrape_job"},
)
sm.targetScrapePoolSymbolTableItems = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "prometheus_target_scrape_pool_symboltable_items",
Help: "Current number of symbols in table for this scrape pool.",
},
[]string{"scrape_job"},
)
sm.targetScrapePoolSyncsCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "prometheus_target_scrape_pool_sync_total",
@ -234,6 +242,7 @@ func newScrapeMetrics(reg prometheus.Registerer) (*scrapeMetrics, error) {
sm.targetScrapePoolExceededTargetLimit,
sm.targetScrapePoolTargetLimit,
sm.targetScrapePoolTargetsAdded,
sm.targetScrapePoolSymbolTableItems,
sm.targetSyncFailed,
// Used by targetScraper.
sm.targetScrapeExceededBodySizeLimit,
@ -274,6 +283,7 @@ func (sm *scrapeMetrics) Unregister() {
sm.reg.Unregister(sm.targetScrapePoolExceededTargetLimit)
sm.reg.Unregister(sm.targetScrapePoolTargetLimit)
sm.reg.Unregister(sm.targetScrapePoolTargetsAdded)
sm.reg.Unregister(sm.targetScrapePoolSymbolTableItems)
sm.reg.Unregister(sm.targetSyncFailed)
sm.reg.Unregister(sm.targetScrapeExceededBodySizeLimit)
sm.reg.Unregister(sm.targetScrapeCacheFlushForced)

2
scrape/scrape.go
View file

@ -246,6 +246,7 @@ func (sp *scrapePool) stop() {
sp.metrics.targetScrapePoolSyncsCounter.DeleteLabelValues(sp.config.JobName)
sp.metrics.targetScrapePoolTargetLimit.DeleteLabelValues(sp.config.JobName)
sp.metrics.targetScrapePoolTargetsAdded.DeleteLabelValues(sp.config.JobName)
sp.metrics.targetScrapePoolSymbolTableItems.DeleteLabelValues(sp.config.JobName)
sp.metrics.targetSyncIntervalLength.DeleteLabelValues(sp.config.JobName)
sp.metrics.targetSyncFailed.DeleteLabelValues(sp.config.JobName)
}
@ -408,6 +409,7 @@ func (sp *scrapePool) Sync(tgs []*targetgroup.Group) {
}
}
}
sp.metrics.targetScrapePoolSymbolTableItems.WithLabelValues(sp.config.JobName).Set(float64(sp.symbolTable.Len()))
sp.targetMtx.Unlock()
sp.sync(all)