ReadGCStats.go

func (c *baseGoCollector) Collect(ch chan<- Metric) {
 ch <- MustNewConstMetric(c.goroutinesDesc, GaugeValue, float64(runtime.NumGoroutine()))
n := getRuntimeNumThreads()
 ch <- MustNewConstMetric(c.threadsDesc, GaugeValue, n)
var stats debug.GCStats
 stats.PauseQuantiles = make([]time.Duration, 5)
 debug.ReadGCStats(&stats)
quantiles := make(map[float64]float64)
 for idx, pq := range stats.PauseQuantiles[1:] {
  quantiles[float64(idx+1)/float64(len(stats.PauseQuantiles)-1)] = pq.Seconds()
 }
 quantiles[0.0] = stats.PauseQuantiles[0].Seconds()
 ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), stats.PauseTotal.Seconds(), quantiles)
 ch <- MustNewConstMetric(c.gcLastTimeDesc, GaugeValue, float64(stats.LastGC.UnixNano())/1e9)
 ch <- MustNewConstMetric(c.goInfoDesc, GaugeValue, 1)
}