use metrics struct. include more statistics
This commit is contained in:
Kevin Pike
parent
5e9294fbb7
commit
c945ed62c1
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@ -1,6 +1,7 @@
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package prometheus
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import (
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"fmt"
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"runtime"
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"runtime/debug"
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"time"
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@ -9,18 +10,8 @@ import (
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type goCollector struct {
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goroutines Gauge
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gcDesc *Desc
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alloc Gauge
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totalAlloc Counter
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sys Counter
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lookups Counter
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mallocs Counter
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frees Counter
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heapAlloc Gauge
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heapSys Gauge
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heapIdle Gauge
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heapInuse Gauge
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heapReleased Gauge
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heapObjects Gauge
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memstats *memStatCollector
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}
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// NewGoCollector returns a collector which exports metrics about the current
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@ -28,104 +19,233 @@ type goCollector struct {
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func NewGoCollector() *goCollector {
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return &goCollector{
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goroutines: NewGauge(GaugeOpts{
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Name: "go_goroutines",
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Namespace: "go",
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Name: "goroutines",
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Help: "Number of goroutines that currently exist.",
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}),
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gcDesc: NewDesc(
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"go_gc_duration_seconds",
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"A summary of the GC invocation durations.",
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nil, nil),
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alloc: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "alloc_bytes",
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Help: "Number of bytes allocated and still in use.",
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}),
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totalAlloc: NewCounter(CounterOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "alloc_bytes_total",
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Help: "Total number of bytes allocated, even if freed.",
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}),
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sys: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "sys_bytes",
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Help: "Number of bytes obtained from system",
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}),
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lookups: NewCounter(CounterOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "lookups_total",
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Help: "Total number of pointer lookups.",
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}),
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mallocs: NewCounter(CounterOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "mallocs_total",
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Help: "Total number of mallocs.",
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}),
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frees: NewCounter(CounterOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "frees_total",
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Help: "Total number of frees.",
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}),
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heapAlloc: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_alloc_bytes",
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Help: "Number heap bytes allocated and still in use.",
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}),
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heapSys: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_sys_bytes",
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Help: "Total bytes in heap obtained from system.",
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}),
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heapIdle: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_idle_bytes",
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Help: "Number bytes in heap waiting to be used.",
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}),
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heapInuse: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_inuse_bytes",
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Help: "Number of bytes in heap that are in use.",
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}),
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heapReleased: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_released_bytes",
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Help: "Number of bytes in heap released to OS.",
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}),
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heapObjects: NewGauge(GaugeOpts{
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Namespace: "go",
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Subsystem: "memstats",
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Name: "heap_objects",
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Help: "Number of allocated objects.",
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}),
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memstats: &memStatCollector{
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ms: new(runtime.MemStats),
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metrics: memStatsMetrics{
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{
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desc: NewDesc(
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memstatNamespace("alloc_bytes"),
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"Number of bytes allocated and still in use.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.Alloc) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("alloc_bytes_total"),
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"Total number of bytes allocated, even if freed.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.TotalAlloc) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("sys_bytes"),
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"Number of bytes obtained from system",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.Sys) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("lookups_total"),
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"Total number of pointer lookups.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.Lookups) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("mallocs_total"),
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"Total number of mallocs.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.Mallocs) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("frees_total"),
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"Total number of frees.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.Frees) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_alloc_bytes"),
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"Number heap bytes allocated and still in use.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapAlloc) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_sys_bytes"),
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"Total bytes in heap obtained from system.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_idle_bytes"),
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"Number bytes in heap waiting to be used.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapIdle) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_inuse_bytes"),
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"Number of bytes in heap that are in use.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapInuse) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_released_bytes"),
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"Number of bytes in heap released to OS.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapReleased) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("heap_objects"),
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"Number of allocated objects.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.HeapObjects) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("stack_bytes_inuse"),
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"Number of bytes in use by the stack allocator.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.StackInuse) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("stack_sys_bytes"),
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"Number of bytes in obtained from system for stack allocator.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.StackSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("mspan_inuse"),
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"Number of mspan structures in use.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.MSpanInuse) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("mspan_sys"),
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"Number of mspan structures obtained from system.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.MSpanSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("mcache_inuse"),
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"Number of mcache structures in use.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.MCacheInuse) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("mcache_sys"),
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"Number of mcache structures obtained from system.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.MCacheSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("buck_hash_sys"),
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"Profiling bucket hash table.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.BuckHashSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("gc_metadata"),
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"GC metadata.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.GCSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("other_sys"),
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"Other system allocations.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.OtherSys) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("next_gc"),
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"Next collection will happen when HeapAlloc ≥ this amount.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.NextGC) },
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valType: GaugeValue,
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}, {
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desc: NewDesc(
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memstatNamespace("last_gc"),
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"End time of last garbage collection (nanoseconds since 1970).",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.LastGC) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("pause_total"),
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"Total garbage collection pauses for all collections.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.PauseTotalNs) },
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valType: CounterValue,
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}, {
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desc: NewDesc(
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memstatNamespace("gc_total"),
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"Number of garbage collection.",
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nil, nil,
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),
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eval: func(ms *runtime.MemStats) float64 { return float64(ms.NumGC) },
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valType: CounterValue,
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},
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},
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},
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}
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}
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func memstatNamespace(s string) string {
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return fmt.Sprintf("go_memstats_%s", s)
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}
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// Describe returns all descriptions of the collector.
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func (c *goCollector) Describe(ch chan<- *Desc) {
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ch <- c.goroutines.Desc()
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ch <- c.gcDesc
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ch <- c.alloc.Desc()
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ch <- c.totalAlloc.Desc()
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ch <- c.sys.Desc()
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ch <- c.lookups.Desc()
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ch <- c.mallocs.Desc()
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ch <- c.frees.Desc()
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ch <- c.heapAlloc.Desc()
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ch <- c.heapSys.Desc()
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ch <- c.heapIdle.Desc()
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ch <- c.heapInuse.Desc()
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ch <- c.heapReleased.Desc()
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ch <- c.heapObjects.Desc()
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c.memstats.Describe(ch)
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}
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// Collect returns the current state of all metrics of the collector.
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@ -144,31 +264,32 @@ func (c *goCollector) Collect(ch chan<- Metric) {
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quantiles[0.0] = stats.PauseQuantiles[0].Seconds()
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ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), float64(stats.PauseTotal.Seconds()), quantiles)
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var ms runtime.MemStats
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runtime.ReadMemStats(&ms)
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c.alloc.Set(float64(ms.Alloc))
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ch <- c.alloc
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c.totalAlloc.Set(float64(ms.TotalAlloc))
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ch <- c.totalAlloc
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c.sys.Set(float64(ms.Sys))
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ch <- c.sys
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c.lookups.Set(float64(ms.Lookups))
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ch <- c.lookups
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c.mallocs.Set(float64(ms.Mallocs))
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ch <- c.mallocs
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c.frees.Set(float64(ms.Frees))
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ch <- c.frees
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c.heapAlloc.Set(float64(ms.HeapAlloc))
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ch <- c.heapAlloc
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c.heapSys.Set(float64(ms.HeapSys))
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ch <- c.heapSys
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c.heapIdle.Set(float64(ms.HeapIdle))
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ch <- c.heapIdle
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c.heapInuse.Set(float64(ms.HeapInuse))
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ch <- c.heapInuse
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c.heapReleased.Set(float64(ms.HeapReleased))
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ch <- c.heapReleased
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c.heapObjects.Set(float64(ms.HeapObjects))
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ch <- c.heapObjects
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c.memstats.Collect(ch)
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}
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// metrics that provide description, value, and value type for memstat metrics
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type memStatsMetrics []struct {
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desc *Desc
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eval func(*runtime.MemStats) float64
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valType ValueType
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}
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type memStatCollector struct {
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// memstats object to reuse
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ms *runtime.MemStats
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// metrics to describe and collect
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metrics memStatsMetrics
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}
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func (c *memStatCollector) Describe(ch chan<- *Desc) {
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for _, i := range c.metrics {
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ch <- i.desc
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}
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}
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func (c *memStatCollector) Collect(ch chan<- Metric) {
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runtime.ReadMemStats(c.ms)
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for _, i := range c.metrics {
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ch <- MustNewConstMetric(i.desc, i.valType, i.eval(c.ms))
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}
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}
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