Atomic measures with Prometheus exposition for the Go programming language.
This is free and unencumbered software released into the public domain.
Metric regisration on package level comes recommened. The declarations help to document the provided funcionality too.
var (
ConnectCount = metrics.MustCounter("db_connects_total", "Number of established initiations.")
CacheBytes = metrics.MustInteger("db_cache_bytes", "Size of collective responses.")
DiskUsage = metrics.Must1LabelRealSample("db_disk_usage_ratio", "device")
)Updates are error free by design, e.g., CacheBytes.Add(-72) or
DiskUsage(dev.Name).Set(1 - dev.Free, time.Now()).
Serve HTTP with just http.HandleFunc("/metrics", metrics.ServeHTTP).
< HTTP/1.1 200 OK
< Content-Type: text/plain;version=0.0.4;charset=utf-8
< Date: Sun, 07 Mar 2021 15:22:47 GMT
< Content-Length: 351
<
# Prometheus Samples
# TYPE db_connects_total counter
# HELP db_connects_total Number of established initiations.
db_connects_total 4 1615130567389
# TYPE db_cache_bytes gauge
# HELP db_cache_bytes Size of collective responses.
db_cache_bytes 7600 1615130567389
# TYPE db_disk_usage_ratio gauge
db_disk_usage_ratio{device="sda"} 0.19 1615130563595
Package github.com/pascaldekloe/metrics/gostat provides a defacto standard
collection of Go metrics, similar to the setup from the
original Prometheus library.
See the
lazy example
for detail on capturing.
The following benchmarks were measured on a Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz.
name time/op
Label/sequential/4-4 22.2ns ± 1%
Label/sequential/4x4-4 25.9ns ± 1%
Label/sequential/4x4x4-4 42.2ns ± 1%
Label/parallel/4-4 45.9ns ± 0%
Label/parallel/4x4-4 50.8ns ± 1%
Label/parallel/4x4x4-4 71.7ns ± 1%
Get/histogram5/sequential-4 89.1ns ± 0%
Get/histogram5/2routines-4 112ns ± 2%
Set/real/sequential-4 6.74ns ± 0%
Set/real/2routines-4 14.8ns ± 4%
Set/sample/sequential-4 18.6ns ± 6%
Set/sample/2routines-4 22.2ns ± 1%
Add/counter/sequential-4 6.75ns ± 0%
Add/counter/2routines-4 21.2ns ± 1%
Add/integer/sequential-4 6.75ns ± 0%
Add/integer/2routines-4 21.2ns ± 1%
Add/histogram5/sequential-4 37.9ns ± 0%
Add/histogram5/2routines-4 85.9ns ± 1%
ServeHTTP/32/counter-4 1.11µs ± 0%
ServeHTTP/32/real-4 2.24µs ± 1%
ServeHTTP/32/integer-4 1.13µs ± 1%
ServeHTTP/32/histogram5-4 9.85µs ± 0%
ServeHTTP/32/label5-4 2.73µs ± 1%
ServeHTTP/32/label2x3x5-4 2.79µs ± 2%
ServeHTTP/32/sample-4 2.70µs ± 1%
ServeHTTP/1024/counter-4 32.1µs ± 1%
ServeHTTP/1024/real-4 62.5µs ± 2%
ServeHTTP/1024/integer-4 32.6µs ± 1%
ServeHTTP/1024/histogram5-4 303µs ± 1%
ServeHTTP/1024/label5-4 76.3µs ± 4%
ServeHTTP/1024/label2x3x5-4 75.8µs ± 3%
ServeHTTP/1024/sample-4 77.7µs ± 3%
ServeHTTP/32768/counter-4 1.18ms ± 1%
ServeHTTP/32768/real-4 2.15ms ± 1%
ServeHTTP/32768/integer-4 1.20ms ± 4%
ServeHTTP/32768/histogram5-4 13.9ms ± 2%
ServeHTTP/32768/label5-4 2.99ms ± 1%
ServeHTTP/32768/label2x3x5-4 2.90ms ± 4%
ServeHTTP/32768/sample-4 2.70ms ± 6%
name alloc/op
Label/sequential/4-4 0.00B
Label/sequential/4x4-4 0.00B
Label/sequential/4x4x4-4 0.00B
Label/parallel/4-4 0.00B
Label/parallel/4x4-4 0.00B
Label/parallel/4x4x4-4 0.00B
Get/histogram5/sequential-4 0.00B
Get/histogram5/2routines-4 0.00B
Set/real/sequential-4 0.00B
Set/real/2routines-4 0.00B
Set/sample/sequential-4 0.00B
Set/sample/2routines-4 0.00B
Add/counter/sequential-4 0.00B
Add/counter/2routines-4 0.00B
Add/integer/sequential-4 0.00B
Add/integer/2routines-4 0.00B
Add/histogram5/sequential-4 0.00B
Add/histogram5/2routines-4 0.00B
ServeHTTP/32/counter-4 560B ± 0%
ServeHTTP/32/real-4 512B ± 0%
ServeHTTP/32/integer-4 560B ± 0%
ServeHTTP/32/histogram5-4 1.19kB ± 0%
ServeHTTP/32/label5-4 560B ± 0%
ServeHTTP/32/label2x3x5-4 752B ± 0%
ServeHTTP/32/sample-4 512B ± 0%
ServeHTTP/1024/counter-4 560B ± 0%
ServeHTTP/1024/real-4 560B ± 0%
ServeHTTP/1024/integer-4 560B ± 0%
ServeHTTP/1024/histogram5-4 1.19kB ± 0%
ServeHTTP/1024/label5-4 560B ± 0%
ServeHTTP/1024/label2x3x5-4 576B ± 0%
ServeHTTP/1024/sample-4 560B ± 0%
ServeHTTP/32768/counter-4 565B ± 0%
ServeHTTP/32768/real-4 569B ± 0%
ServeHTTP/32768/integer-4 565B ± 0%
ServeHTTP/32768/histogram5-4 1.26kB ± 0%
ServeHTTP/32768/label5-4 573B ± 0%
ServeHTTP/32768/label2x3x5-4 588B ± 0%
ServeHTTP/32768/sample-4 571B ± 0%
name allocs/op
Label/sequential/4-4 0.00
Label/sequential/4x4-4 0.00
Label/sequential/4x4x4-4 0.00
Label/parallel/4-4 0.00
Label/parallel/4x4-4 0.00
Label/parallel/4x4x4-4 0.00
Get/histogram5/sequential-4 0.00
Get/histogram5/2routines-4 0.00
Set/real/sequential-4 0.00
Set/real/2routines-4 0.00
Set/sample/sequential-4 0.00
Set/sample/2routines-4 0.00
Add/counter/sequential-4 0.00
Add/counter/2routines-4 0.00
Add/integer/sequential-4 0.00
Add/integer/2routines-4 0.00
Add/histogram5/sequential-4 0.00
Add/histogram5/2routines-4 0.00
ServeHTTP/32/counter-4 5.00 ± 0%
ServeHTTP/32/real-4 5.00 ± 0%
ServeHTTP/32/integer-4 5.00 ± 0%
ServeHTTP/32/histogram5-4 10.0 ± 0%
ServeHTTP/32/label5-4 5.00 ± 0%
ServeHTTP/32/label2x3x5-4 6.00 ± 0%
ServeHTTP/32/sample-4 5.00 ± 0%
ServeHTTP/1024/counter-4 5.00 ± 0%
ServeHTTP/1024/real-4 5.00 ± 0%
ServeHTTP/1024/integer-4 5.00 ± 0%
ServeHTTP/1024/histogram5-4 10.0 ± 0%
ServeHTTP/1024/label5-4 5.00 ± 0%
ServeHTTP/1024/label2x3x5-4 5.00 ± 0%
ServeHTTP/1024/sample-4 5.00 ± 0%
ServeHTTP/32768/counter-4 5.00 ± 0%
ServeHTTP/32768/real-4 5.00 ± 0%
ServeHTTP/32768/integer-4 5.00 ± 0%
ServeHTTP/32768/histogram5-4 10.0 ± 0%
ServeHTTP/32768/label5-4 5.00 ± 0%
ServeHTTP/32768/label2x3x5-4 5.00 ± 0%
ServeHTTP/32768/sample-4 5.00 ± 0%
name speed
ServeHTTP/32/counter-4 1.75GB/s ± 0%
ServeHTTP/32/real-4 754MB/s ± 1%
ServeHTTP/32/integer-4 1.67GB/s ± 1%
ServeHTTP/32/histogram5-4 878MB/s ± 0%
ServeHTTP/32/label5-4 889MB/s ± 1%
ServeHTTP/32/label2x3x5-4 1.14GB/s ± 2%
ServeHTTP/32/sample-4 625MB/s ± 1%
ServeHTTP/1024/counter-4 2.03GB/s ± 1%
ServeHTTP/1024/real-4 914MB/s ± 2%
ServeHTTP/1024/integer-4 1.94GB/s ± 1%
ServeHTTP/1024/histogram5-4 946MB/s ± 1%
ServeHTTP/1024/label5-4 1.06GB/s ± 4%
ServeHTTP/1024/label2x3x5-4 1.38GB/s ± 3%
ServeHTTP/1024/sample-4 735MB/s ± 3%
ServeHTTP/32768/counter-4 1.92GB/s ± 1%
ServeHTTP/32768/real-4 929MB/s ± 1%
ServeHTTP/32768/integer-4 1.83GB/s ± 4%
ServeHTTP/32768/histogram5-4 690MB/s ± 2%
ServeHTTP/32768/label5-4 921MB/s ± 1%
ServeHTTP/32768/label2x3x5-4 1.21GB/s ± 4%
ServeHTTP/32768/sample-4 742MB/s ± 5%