metrics/README.md
2019-04-08 17:05:34 +03:00

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# metrics - lightweight package for exporting metrics in Prometheus format
### Features
* Lightweight. Has minimal number of third-party dependencies and all these deps are small.
See [this article](https://medium.com/@valyala/stripping-dependency-bloat-in-victoriametrics-docker-image-983fb5912b0d) for details.
* Easy to use. See the [API docs](http://godoc.org/github.com/VictoriaMetrics/metrics).
* Fast.
### Limitations
* It doesn't implement advanced functionality from [github.com/prometheus/client_golang/prometheus](https://godoc.org/github.com/prometheus/client_golang/prometheus).
### Usage
```go
import "github.com/VictoriaMetrics/metrics"
// ...
var (
requestsTotal = metrics.NewCounter("requests_total")
queueSize = metrics.NewGauge(`queue_size{queue="foobar"}`, func() float64 {
return float64(foobarQueue.Len())
})
requestDuration = metrics.NewSummary(`requests_duration_seconds{handler="/my/super/handler"}`)
)
// ...
func requestHandler() {
startTime := time.Now()
// ...
requestsTotal.Inc()
requestDuration.UpdateDuration(startTime)
}
```
See [docs](http://godoc.org/github.com/VictoriaMetrics/metrics) for more info.
### Users
* `Metrics` has been extracted from [VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics) sources.
See [this article](https://medium.com/devopslinks/victoriametrics-creating-the-best-remote-storage-for-prometheus-5d92d66787ac)
for more info about `VictoriaMetrics`.