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
// >
// >
}
func main() {
router := routers.NewRouter()
var port string
fmt.Printf("len(os.Args) = %d ", len(os.Args))
if len(os.Args) <= 1 {
fmt.Println("Please speficy the port or use default port 8090")
port = "8090"
} else {
port = os.Args[1]
}
fmt.Printf("port = %s", port)
// histogram
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))
router.Handle("/metrics", prometheus.Handler())
//log.Fatal(http.ListenAndServe(":8090", router))
log.Fatal(http.ListenAndServe(":"+port, router))
}
// limitations under the License.
package tidb
import (
"github.com/prometheus/client_golang/prometheus"
)
var (
sessionExecuteParseDuration = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "tidb",
Subsystem: "server",
Name: "session_execute_parse_duration",
Help: "Bucketed histogram of processing time (s) in parse SQL.",
Buckets: prometheus.LinearBuckets(0.00004, 0.00001, 13),
})
sessionExecuteCompileDuration = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "tidb",
Subsystem: "server",
Name: "session_execute_compile_duration",
Help: "Bucketed histogram of processing time (s) in query optimize.",
Buckets: prometheus.LinearBuckets(0.00004, 0.00001, 13),
})
sessionExecuteRunDuration = prometheus.NewHistogram(
prometheus.HistogramOpts{
Namespace: "tidb",
Subsystem: "server",
Name: "session_execute_run_duration",
Help: "Bucketed histogram of processing time (s) in running executor.",
// initMetrics initialises a new metrics instance.
// This is deliberately not exposed but is useful for testing.
func initMetrics(url string, frequency, timeout time.Duration, customLabels map[string]string) *metrics {
u, err := user.Current()
if err != nil {
log.Warning("Can't determine current user name for metrics")
u = &user.User{Username: "******"}
}
constLabels := prometheus.Labels{
"user": u.Username,
"arch": runtime.GOOS + "_" + runtime.GOARCH,
}
for k, v := range customLabels {
constLabels[k] = deriveLabelValue(v)
}
m = &metrics{
url: url,
stopChan: make(chan bool),
timeout: timeout,
}
// Count of builds for each target.
m.buildCounter = prometheus.NewCounterVec(prometheus.CounterOpts{
Name: "build_counts",
Help: "Count of number of times each target is built",
ConstLabels: constLabels,
}, []string{"success", "incremental"})
// Count of cache hits for each target
m.cacheCounter = prometheus.NewCounterVec(prometheus.CounterOpts{
Name: "cache_hits",
Help: "Count of number of times we successfully retrieve from the cache",
ConstLabels: constLabels,
}, []string{"hit"})
// Count of test runs for each target
m.testCounter = prometheus.NewCounterVec(prometheus.CounterOpts{
Name: "test_runs",
Help: "Count of number of times we run each test",
ConstLabels: constLabels,
}, []string{"pass"})
// Build durations for each target
m.buildHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Name: "build_durations_histogram",
Help: "Durations of individual build targets",
Buckets: prometheus.LinearBuckets(0, 0.1, 100),
ConstLabels: constLabels,
}, []string{})
// Cache retrieval durations for each target
m.cacheHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Name: "cache_durations_histogram",
Help: "Durations to retrieve artifacts from the cache",
Buckets: prometheus.LinearBuckets(0, 0.1, 100),
ConstLabels: constLabels,
}, []string{})
// Test durations for each target
m.testHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Name: "test_durations_histogram",
Help: "Durations to run tests",
Buckets: prometheus.LinearBuckets(0, 1, 100),
ConstLabels: constLabels,
}, []string{})
go m.keepPushing(frequency)
return m
}
Name: "unique_lurking_agents",
Subsystem: "presence",
Help: "Number of unique, lurking agents in the presence table.",
})
uniqueWebAgentCount = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "unique_web_agents",
Subsystem: "presence",
Help: "Number of unique agents using the web client in the presence table.",
})
sessionsPerAgent = prometheus.NewHistogram(prometheus.HistogramOpts{
Name: "sessions_per_agent",
Subsystem: "presence",
Help: "Number of simultaneous live sessions for each active agent.",
Buckets: prometheus.LinearBuckets(0, 1, 10),
})
)
func init() {
prometheus.MustRegister(rowCount)
prometheus.MustRegister(activeRowCount)
prometheus.MustRegister(activeRowCountPerRoom)
prometheus.MustRegister(lurkingRowCount)
prometheus.MustRegister(lurkingRowCountPerRoom)
prometheus.MustRegister(uniqueAgentCount)
prometheus.MustRegister(uniqueLurkingAgentCount)
prometheus.MustRegister(uniqueWebAgentCount)
prometheus.MustRegister(sessionsPerAgent)
}
[]string{"service_name", "status_code", "client_ip"},
)
serviceMaxUseTime = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "service_max_use_time",
Help: "service max use time",
},
[]string{"service_name", "status_code", "client_ip"},
)
serviceUseTimeDistributions = prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "service_use_time_distributions",
Help: "service use time distributions",
Buckets: prometheus.LinearBuckets(0, 100000, 11),
},
[]string{"service_name", "status_code"},
)
serviceAnalyseResults = make(map[string]*data.AnalyseResult)
)
func init() {
prometheus.MustRegister(serviceReqCountCollector)
prometheus.MustRegister(serviceReqAvgUseTime)
prometheus.MustRegister(serviceMaxUseTime)
prometheus.MustRegister(serviceUseTimeDistributions)
}
func resetCollector() {
rpcDurations = prometheus.NewSummaryVec(
prometheus.SummaryOpts{
Name: "rpc_durations_seconds",
Help: "RPC latency distributions.",
Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
},
[]string{"service"},
)
// The same as above, but now as a histogram, and only for the normal
// distribution. The buckets are targeted to the parameters of the
// normal distribution, with 20 buckets centered on the mean, each
// half-sigma wide.
rpcDurationsHistogram = prometheus.NewHistogram(prometheus.HistogramOpts{
Name: "rpc_durations_histogram_seconds",
Help: "RPC latency distributions.",
Buckets: prometheus.LinearBuckets(*normMean-5**normDomain, .5**normDomain, 20),
})
)
func init() {
// Register the summary and the histogram with Prometheus's default registry.
prometheus.MustRegister(rpcDurations)
prometheus.MustRegister(rpcDurationsHistogram)
}
func main() {
flag.Parse()
start := time.Now()
oscillationFactor := func() float64 {
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus_test
import (
"math/rand"
"time"
"github.com/prometheus/client_golang/prometheus"
)
var (
requestDuration = prometheus.NewHistogram(prometheus.HistogramOpts{
Name: "example_request_duration_seconds",
Help: "Histogram for the runtime of a simple example function.",
Buckets: prometheus.LinearBuckets(0.01, 0.01, 10),
})
)
func ExampleTimer() {
// timer times this example function. It uses a Histogram, but a Summary
// would also work, as both implement Observer. Check out
// https://prometheus.io/docs/practices/histograms/ for differences.
timer := prometheus.NewTimer(requestDuration)
defer timer.ObserveDuration()
// Do something here that takes time.
time.Sleep(time.Duration(rand.NormFloat64()*10000+50000) * time.Microsecond)
}