示例#1
0
func ExampleHistogram() {
	temps := prometheus.NewHistogram(prometheus.HistogramOpts{
		Name:    "pond_temperature_celsius",
		Help:    "The temperature of the frog pond.", // Sorry, we can't measure how badly it smells.
		Buckets: prometheus.LinearBuckets(20, 5, 5),  // 5 buckets, each 5 centigrade wide.
	})

	// Simulate some observations.
	for i := 0; i < 1000; i++ {
		temps.Observe(30 + math.Floor(120*math.Sin(float64(i)*0.1))/10)
	}

	// Just for demonstration, let's check the state of the histogram by
	// (ab)using its Write method (which is usually only used by Prometheus
	// internally).
	metric := &dto.Metric{}
	temps.Write(metric)
	fmt.Println(proto.MarshalTextString(metric))

	// Output:
	// histogram: <
	//   sample_count: 1000
	//   sample_sum: 29969.50000000001
	//   bucket: <
	//     cumulative_count: 192
	//     upper_bound: 20
	//   >
	//   bucket: <
	//     cumulative_count: 366
	//     upper_bound: 25
	//   >
	//   bucket: <
	//     cumulative_count: 501
	//     upper_bound: 30
	//   >
	//   bucket: <
	//     cumulative_count: 638
	//     upper_bound: 35
	//   >
	//   bucket: <
	//     cumulative_count: 816
	//     upper_bound: 40
	//   >
	// >
}
示例#2
0
文件: prom.go 项目: rht/bssim
// class to handle prometheus metric recording
package main

import (
	"fmt"
	prom "github.com/heems/bssim/Godeps/_workspace/src/github.com/prometheus/client_golang/prometheus"
	"time"
)

var (
	fields = []string{"latency", "bandwidth", "block_size"}
	//  NewSummaryVec(opts, ["filename", "pid", "latency", "bandwidth"]
	fileTimes = prom.NewHistogramVec(prom.HistogramOpts{
		Name:    "file_times_ms",
		Help:    "Time for peer to get a file.",
		Buckets: prom.LinearBuckets(1, .25, 12),
	}, fields)

	blockTimes = prom.NewHistogramVec(prom.HistogramOpts{
		Name:    "block_times_ms",
		Help:    "Time for peer to get a block.",
		Buckets: prom.ExponentialBuckets(0.005, 10, 10),
		//Buckets: prom.LinearBuckets(0, .05, 100),
	}, fields)

	dupBlocks = prom.NewGaugeVec(prom.GaugeOpts{
		Name: "dup_blocks_count",
		Help: "Count of total duplicate blocks received.",
	}, fields)
)