How to retrieve memory statistics (e.g., allocated memory) using runtime.ReadMemStats()?

To retrieve memory statistics such as allocated memory using runtime.ReadMemStats(), follow these steps:

Import the runtime package at the beginning of your code:

import "runtime"

Define a struct to hold the memory statistics. The runtime.MemStats struct, which is predefined in the runtime package, should be used for this purpose:

var memStats runtime.MemStats

Call the runtime.ReadMemStats() function to populate the memStats struct with the current memory statistics:

runtime.ReadMemStats(&memStats)

Access the desired memory statistics from the memStats struct. For example, to retrieve the total allocated memory, you can access the Alloc field of the memStats struct:

allocatedMemory := memStats.Alloc

Here's an example program that retrieves the allocated memory and prints it:

package main

import (
	"fmt"
	"runtime"
)

func main() {
	var memStats runtime.MemStats

	// Retrieve memory statistics
	runtime.ReadMemStats(&memStats)

	// Access allocated memory
	allocatedMemory := memStats.Alloc

	fmt.Printf("Allocated memory: %d bytes\n", allocatedMemory)
}

By running this program, you will get the current allocated memory in bytes.