a program to check minimum VSZ limitation to start

memerr.go

package main

import (
	"crypto/rand"
	"fmt"
	"io"
	"os"
	"runtime"
	"time"

	"github.com/dustin/go-humanize"
)

func memStat(w io.Writer, n int) {
	var m runtime.MemStats
	runtime.ReadMemStats(&m)
	//fmt.Fprintf(w, "Sys=%s Alloc=%s\n", humanize.IBytes(m.Sys), humanize.IBytes(m.Alloc))
	fmt.Fprintf(w, "Sys=%s - Heap=%s Stack=%s MSpan=%s MCache=%s BuckHash=%s GC=%s Other=%s\n",
		humanize.IBytes(m.Sys),
		humanize.IBytes(m.HeapSys),
		humanize.IBytes(m.StackSys),
		humanize.IBytes(m.MSpanSys),
		humanize.IBytes(m.MCacheSys),
		humanize.IBytes(m.BuckHashSys),
		humanize.IBytes(m.GCSys),
		humanize.IBytes(m.OtherSys),
	)
}

func main() {
	memStat(os.Stdout, 0)
	var foo [][]byte
	for i := 0; i < 10; i++ {
		time.Sleep(2 * time.Second)
		bar := make([]byte, 128*1024*1024)
		rand.Read(bar)
		foo = append(foo, bar)
		memStat(os.Stdout, i+1)
	}
	fmt.Printf("len(foo)=%d\n", len(foo))
}