mem usage

sys/show_usage.go

@@ -0,0 +1,35 @@
+package sys
+
+import (
+	"fmt"
+	"runtime"
+)
+
+type MemUsage struct {
+	Alloc      float64
+	TotalAlloc float64
+	Sys        float64
+	NumGC      uint32
+}
+
+func (m MemUsage) String() string {
+	return fmt.Sprintf("Alloc = %.2fMB TotalAlloc = %.2fMB Sys = %.2fMB NumGC = %v",
+		m.Alloc,
+		m.TotalAlloc,
+		m.Sys,
+		m.NumGC)
+}
+
+func ShowMemUsage() MemUsage {
+	var m runtime.MemStats
+
+	runtime.ReadMemStats(&m)
+	mb := 1024 * 1024.0
+
+	return MemUsage{
+		Alloc:      float64(m.Alloc) / mb,
+		TotalAlloc: float64(m.TotalAlloc) / mb,
+		Sys:        float64(m.Sys) / mb,
+		NumGC:      m.NumGC,
+	}
+}