如何恢复程序的内存使用情况
本文关键字:用情 情况 内存 恢复程序 | 更新日期: 2023-09-27 18:21:54
我正在创建一个使用大量内存的应用程序。当我完成计算时,程序仍然具有高内存,正如我在任务管理器中注意到的那样。
如何重置程序的RAM内存使用率?
我正在创建一个大数组,在其中存储MB的随机字符。然后将所有字符打印到一个变量中,然后将变量的内容写入文件中。
namespace Fake_File_Creator
{
public partial class MainWindow : Form
{
private string text;
private List<char> stringChars;
public MainWindow()
{
InitializeComponent();
}
private void btnNewFile_Click(object sender, EventArgs e)
{
sfdNewFile.Filter = "All Files|*.*";
if (sfdNewFile.ShowDialog() == DialogResult.OK)
{
lblMessage.Text = "Generating data...";
bwCreateData.RunWorkerAsync((int)nudSize.Value * 1024000);
}
}
private void bwCreateData_DoWork(object sender, DoWorkEventArgs e)
{
var random = new Random();
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 ~!@#$%^&*()_+ /.,'[];{}|:<>?";
stringChars = new List<char>();
for (int i = 0; i < (int)e.Argument; i++)
{
stringChars.Add(chars[random.Next(chars.Length)]);
}
text = new string(stringChars.ToArray());
}
void bwCreateData_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
lblMessage.Text = "Saving file...";
bwCreateFile.RunWorkerAsync();
}
private void bwCreateFile_DoWork(object sender, DoWorkEventArgs e)
{
using (StreamWriter outfile = new StreamWriter(sfdNewFile.FileName))
{
outfile.Write(text);
}
}
void bwCreateFile_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
lblMessage.Text = "File succesfully created...";
text = string.Empty;
stringChars.Clear();
stringChars.TrimExcess();
}
}
}
对此您无能为力。当垃圾回收发生时,未使用对象消耗的内存将被释放。而且你不能强迫垃圾收集。你可以在MSDN上阅读更多关于它的信息,也可以查看GC类
MSDN 中的示例
private const long maxGarbage = 1000;
static void Main()
{
MyGCCollectClass myGCCol = new MyGCCollectClass();
// Determine the maximum number of generations the system
// garbage collector currently supports.
Console.WriteLine("The highest generation is {0}", GC.MaxGeneration);
myGCCol.MakeSomeGarbage();
// Determine which generation myGCCol object is stored in.
Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
// Determine the best available approximation of the number
// of bytes currently allocated in managed memory.
Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
// Perform a collection of generation 0 only.
GC.Collect(0);
// Determine which generation myGCCol object is stored in.
Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
// Perform a collection of all generations up to and including 2.
GC.Collect(2);
// Determine which generation myGCCol object is stored in.
Console.WriteLine("Generation: {0}", GC.GetGeneration(myGCCol));
Console.WriteLine("Total Memory: {0}", GC.GetTotalMemory(false));
Console.Read();
}
void MakeSomeGarbage()
{
Version vt;
for(int i = 0; i < maxGarbage; i++)
{
// Create objects and release them to fill up memory
// with unused objects.
vt = new Version();
}
}
具有资源的类型应该实现IDisposable,释放这些资源是通过调用Dispose(或将它们封装在using语句中)来完成的。GC.Collect仅对具有资源但不实现IDisposable的对象是必需的。
您不能强制GC
但是,如果您想在完成数组后立即释放内存。
//I assume stringChars is the array
stringChars.Clear();
stringChars = null;
GC.Collect();
这取决于您想要释放的内存类型。真的在调用GC.Collect();可能不起作用。为什么?
-
它收集对象,但您不知道哪些对象。你的物体很大。通常垃圾收集器不收集大对象,或者很少收集(但很少用于机器时间测量,而不是用于人类)。
-
分配给阵列的虚拟内存很可能不会释放给操作系统。因为虚拟机内存管理器通常会重用释放的内存。它们还执行内存的预分配。它们分配一大块内存,然后使用它。这允许不执行大量系统调用来为新对象获取内存,因为.NET语言通常会创建大量内存(在C++中,复制被大量使用,堆与.NET内存管理器相比是"伪"的)。