golang 内存占用测量

web服务中加入如下

import (
    "runtime"
    "time"
    "fmt"
)    

go func() {
        for {
            var m runtime.MemStats
            tick := time.After(5 * time.Second)
            select {
            case <-tick:
                runtime.ReadMemStats(&m)
                gb := 1024 * 1024 * 1024.0
                logstr := fmt.Sprintf("
Alloc = %v	TotalAlloc = %v	Sys = %v	 NumGC = %v

", float64(m.Alloc)/gb, float64(m.TotalAlloc)/gb, float64(m.Sys)/gb, m.NumGC)

                logger.Runtime.Info(logstr)
            }
        }
    }()