format status memory sizes

engine/responder.go

@@ -592,8 +592,8 @@ func (rs *Responder) Status(arg string, reply *map[string]interface{}) (err erro
 	if rs.Bal != nil {
 		response["Raters"] = rs.Bal.GetClientAddresses()
 	}
-	response["memstat"] = memstats.HeapAlloc / 1024
-	response["footprint"] = memstats.Sys / 1024
+	response["memstat"] = utils.SizeFmt(float64(memstats.HeapAlloc), "")
+	response["footprint"] = utils.SizeFmt(float64(memstats.Sys), "")
 	*reply = response
 	return
 }

utils/coreutils.go

@@ -533,3 +533,17 @@ func GetEndOfMonth(ref time.Time) time.Time {
 	eom := time.Date(year, month, 1, 0, 0, 0, 0, ref.Location())
 	return eom.Add(-time.Second)
 }
+
+// formats number in K,M,G, etc.
+func SizeFmt(num float64, suffix string) string {
+	if suffix == "" {
+		suffix = "B"
+	}
+	for _, unit := range []string{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"} {
+		if math.Abs(num) < 1024.0 {
+			return fmt.Sprintf("%3.1f%s%s", num, unit, suffix)
+		}
+		num /= 1024.0
+	}
+	return fmt.Sprintf("%.1f%s%s", num, "Yi", suffix)
+}