var m runtime.MemStats

/*If that is not working, or it is too much time, you can add a periodic call to

FreeOSMemory (no need to call runtime.GC() before, it is done by debug.FreeOSMemory() )

Something like this: http://play.golang.org/p/mP7_sMpX4F

package main

import (

"runtime/debug"

"time"

)

func main() {

go periodicFree(1 * time.Minute)

// Your program goes here

}

func periodicFree(d time.Duration) {

tick := time.Tick(d)

for _ = range tick {

debug.FreeOSMemory()

}

}

Take into account that every call to FreeOSMemory will take some time (not much)

and it can be partly run in parallel if GOMAXPROCS>1 since Go1.3.*/

debug.FreeOSMemory()

/*Then you can either render it to a dot file with graphical

representation of the heap or convert it to hprof format. To render it to a dot file:

$ go get github.com/randall77/hprof/dumptodot

$ dumptodot heapdump mybinary > heap.dot

and open heap.dot with Graphviz.*/

f, err := os.Create("heapdump")

if err != nil {

panic(err)

}

debug.WriteHeapDump(f.Fd())

fmt.Println(runtime.GOOS)

fmt.Println(runtime.NumCPU())

fmt.Println(runtime.NumGoroutine())

fmt.Println(runtime.GOARCH)

runtime.ReadMemStats(&m)

fmt.Println(m.TotalAlloc)

fmt.Println(m.Alloc)

fmt.Println(m.Sys)