provider a out-of-the-box go metrics lib to collect stats of the machine and go runtime.
Package rmetric provides method to collect metrics of go runtime so it is called as rmetric (runtime metrics).
You can use it to get:
type RuntimeStats struct {
// CPU
NumCPU int64 `json:"cpu.count"`
NumThread int64 `json:"cpu.threads"`
NumGoroutine int64 `json:"cpu.goroutines"`
NumCgoCall int64 `json:"cpu.cgo_calls"`
// General
Alloc int64 `json:"mem.alloc"`
TotalAlloc int64 `json:"mem.total"`
Sys int64 `json:"mem.sys"`
Lookups int64 `json:"mem.lookups"`
Mallocs int64 `json:"mem.malloc"`
Frees int64 `json:"mem.frees"`
// Heap
HeapAlloc int64 `json:"mem.heap.alloc"`
HeapSys int64 `json:"mem.heap.sys"`
HeapIdle int64 `json:"mem.heap.idle"`
HeapInuse int64 `json:"mem.heap.inuse"`
HeapReleased int64 `json:"mem.heap.released"`
HeapObjects int64 `json:"mem.heap.objects"`
// Stack
StackInuse int64 `json:"mem.stack.inuse"`
StackSys int64 `json:"mem.stack.sys"`
MSpanInuse int64 `json:"mem.stack.mspan_inuse"`
MSpanSys int64 `json:"mem.stack.mspan_sys"`
MCacheInuse int64 `json:"mem.stack.mcache_inuse"`
MCacheSys int64 `json:"mem.stack.mcache_sys"`
OtherSys int64 `json:"mem.othersys"`
// GC
GCSys int64 `json:"mem.gc.sys"`
NextGC int64 `json:"mem.gc.next"`
LastGC int64 `json:"mem.gc.last"`
PauseTotalNs int64 `json:"mem.gc.pause_total"`
PauseNs int64 `json:"mem.gc.pause"`
NumGC int64 `json:"mem.gc.count"`
GCCPUFraction float64 `json:"mem.gc.cpu_fraction"`
Goarch string `json:"-"`
Goos string `json:"-"`
Version string `json:"-"`
}You can check expvar to see how to use them to collect metrics which add metrics to expvar, and you can use the below url to see metrics:
http://xxx.xxx.xxx.xxx/debug/varsOf course you can add these metrics in your web frameworks just like expvar.
Package system provides method to collect metrics of machines.
You can use it to get:
type SystemStats struct {
CPUStat struct {
User float64
System float64
Idle float64
Iowait float64
}
LoadStat struct {
Load1 float64
Load5 float64
Load15 float64
}
MemStat struct {
Total uint64
Available uint64
Used uint64
}
SwapMemStat struct {
Total uint64
Free uint64
Used uint64
}
DiskStat map[string]DiskStat
BandwidthStat map[string]BandwidthStat
}