github.com/elastos/Elastos.ELA.SideChain.ETH@v0.2.2/metrics/syslog.go (about) 1 // +build !windows 2 3 package metrics 4 5 import ( 6 "fmt" 7 "log/syslog" 8 "time" 9 ) 10 11 // Output each metric in the given registry to syslog periodically using 12 // the given syslogger. 13 func Syslog(r Registry, d time.Duration, w *syslog.Writer) { 14 for range time.Tick(d) { 15 r.Each(func(name string, i interface{}) { 16 switch metric := i.(type) { 17 case Counter: 18 w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Count())) 19 case Gauge: 20 w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Value())) 21 case GaugeFloat64: 22 w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Value())) 23 case Healthcheck: 24 metric.Check() 25 w.Info(fmt.Sprintf("healthcheck %s: error: %v", name, metric.Error())) 26 case Histogram: 27 h := metric.Snapshot() 28 ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) 29 w.Info(fmt.Sprintf( 30 "histogram %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f", 31 name, 32 h.Count(), 33 h.Min(), 34 h.Max(), 35 h.Mean(), 36 h.StdDev(), 37 ps[0], 38 ps[1], 39 ps[2], 40 ps[3], 41 ps[4], 42 )) 43 case Meter: 44 m := metric.Snapshot() 45 w.Info(fmt.Sprintf( 46 "meter %s: count: %d 1-min: %.2f 5-min: %.2f 15-min: %.2f mean: %.2f", 47 name, 48 m.Count(), 49 m.Rate1(), 50 m.Rate5(), 51 m.Rate15(), 52 m.RateMean(), 53 )) 54 case Timer: 55 t := metric.Snapshot() 56 ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) 57 w.Info(fmt.Sprintf( 58 "timer %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f 1-min: %.2f 5-min: %.2f 15-min: %.2f mean-rate: %.2f", 59 name, 60 t.Count(), 61 t.Min(), 62 t.Max(), 63 t.Mean(), 64 t.StdDev(), 65 ps[0], 66 ps[1], 67 ps[2], 68 ps[3], 69 ps[4], 70 t.Rate1(), 71 t.Rate5(), 72 t.Rate15(), 73 t.RateMean(), 74 )) 75 } 76 }) 77 } 78 }