Go port of Coda Hale's Metrics library: https://github.com/dropwizard/metrics.
Documentation: http://godoc.org/github.com/rcrowley/go-metrics.
Create and update metrics:
c := metrics.NewCounter()
metrics.Register("foo", c)
c.Inc(47)
g := metrics.NewGauge()
metrics.Register("bar", g)
g.Update(47)
r := NewRegistry()
g := metrics.NewRegisteredFunctionalGauge("cache-evictions", r, func() int64 { return cache.getEvictionsCount() })
s := metrics.NewExpDecaySample(1028, 0.015) // or metrics.NewUniformSample(1028)
h := metrics.NewHistogram(s)
metrics.Register("baz", h)
h.Update(47)
m := metrics.NewMeter()
metrics.Register("quux", m)
m.Mark(47)
t := metrics.NewTimer()
metrics.Register("bang", t)
t.Time(func() {})
t.Update(47)Register() is not threadsafe. For threadsafe metric registration use GetOrRegister:
t := metrics.GetOrRegisterTimer("account.create.latency", nil)
t.Time(func() {})
t.Update(47)NOTE: Be sure to unregister short-lived meters and timers otherwise they will leak memory:
// Will call Stop() on the Meter to allow for garbage collection
metrics.Unregister("quux")
// Or similarly for a Timer that embeds a Meter
metrics.Unregister("bang")Periodically log every metric in human-readable form to standard error:
go metrics.Log(metrics.DefaultRegistry, 5 * time.Second, log.New(os.Stderr, "metrics: ", log.Lmicroseconds))Periodically log every metric in slightly-more-parseable form to syslog:
w, _ := syslog.Dial("unixgram", "/dev/log", syslog.LOG_INFO, "metrics")
go metrics.Syslog(metrics.DefaultRegistry, 60e9, w)Periodically emit every metric to Graphite using the Graphite client:
import "github.com/cyberdelia/go-metrics-graphite"
addr, _ := net.ResolveTCPAddr("tcp", "127.0.0.1:2003")
go graphite.Graphite(metrics.DefaultRegistry, 10e9, "metrics", addr)Periodically emit every metric into InfluxDB:
NOTE: this has been pulled out of the library due to constant fluctuations in the InfluxDB API. In fact, all client libraries are on their way out. see issues #121 and #124 for progress and details.
import "github.com/vrischmann/go-metrics-influxdb"
go influxdb.InfluxDB(metrics.DefaultRegistry,
10e9,
"127.0.0.1:8086",
"database-name",
"username",
"password"
)Periodically upload every metric to Librato using the Librato client:
Note: the client included with this repository under the librato package
has been deprecated and moved to the repository linked above.
import "github.com/mihasya/go-metrics-librato"
go librato.Librato(metrics.DefaultRegistry,
10e9, // interval
"[email protected]", // account owner email address
"token", // Librato API token
"hostname", // source
[]float64{0.95}, // percentiles to send
time.Millisecond, // time unit
)Periodically emit every metric to StatHat:
import "github.com/rcrowley/go-metrics/stathat"
go stathat.Stathat(metrics.DefaultRegistry, 10e9, "[email protected]")Maintain all metrics along with expvars at /debug/metrics:
This uses the same mechanism as the official expvar
but exposed under /debug/metrics, which shows a json representation of all your usual expvars
as well as all your go-metrics.
import "github.com/rcrowley/go-metrics/exp"
exp.Exp(metrics.DefaultRegistry)go get github.com/rcrowley/go-metricsStatHat support additionally requires their Go client:
go get github.com/stathat/goClients are available for the following destinations:
- AppOptics - https://github.com/ysamlan/go-metrics-appoptics
- Librato - https://github.com/mihasya/go-metrics-librato
- Graphite - https://github.com/cyberdelia/go-metrics-graphite
- InfluxDB - https://github.com/vrischmann/go-metrics-influxdb
- Ganglia - https://github.com/appscode/metlia
- Prometheus - https://github.com/deathowl/go-metrics-prometheus
- DataDog - https://github.com/syntaqx/go-metrics-datadog
- SignalFX - https://github.com/pascallouisperez/go-metrics-signalfx
- Honeycomb - https://github.com/getspine/go-metrics-honeycomb
- Wavefront - https://github.com/wavefrontHQ/go-metrics-wavefront
- Open-Falcon - https://github.com/g4zhuj/go-metrics-falcon
- AWS CloudWatch - https://github.com/savaki/cloudmetrics