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Process.VirtualMemorySize64 Property

Gets the amount of the virtual memory allocated for the associated process.

Namespace: System.Diagnostics
Assembly: System (in system.dll)

[ComVisibleAttribute(false)] 
public long VirtualMemorySize64 { get; }
/** @property */
public long get_VirtualMemorySize64 ()

public function get VirtualMemorySize64 () : long

Not applicable.

Property Value

The amount of virtual memory, in bytes, allocated for the associated process.

Exception typeCondition

PlatformNotSupportedException

The platform is Windows 98 or Windows Millennium Edition (Windows Me), which does not support this property.

The value returned by this property represents the current size of virtual memory used by the process. The operating system maps the virtual address space for each process either to pages loaded in physical memory, or to pages stored in the virtual memory paging file on disk.

This property can be used to monitor memory usage on computers with 32-bit processors or 64-bit processors. The property value is equivalent to the Virtual Bytes performance counter for the process.

Windows 98, Windows Millennium Edition Platform Note: This property is not supported on Windows 98 or Windows Millennium Edition (Windows Me).

The following code example starts an instance of the Notepad application. The example then retrieves and displays various properties of the associated process. The example detects when the process exits, and displays its exit code and peak memory statistics.

using System;
using System.Diagnostics;

namespace ProcessSample
{
    class ProcessMonitorSample
    {
        public static void Main()
        {

            // Define variables to track the peak
            // memory usage of the process.
            long peakPagedMem = 0, 
                peakWorkingSet = 0, 
                peakVirtualMem = 0;

            Process myProcess = null;

            try 
            {
                // Start the process.
                myProcess = Process.Start("NotePad.exe");
    
                // Display the process statistics until
                // the user closes the program.
                do 
                {
                    if (!myProcess.HasExited)
                    {
                        // Refresh the current process property values.
                        myProcess.Refresh();

                        Console.WriteLine();
                        
                        // Display current process statistics.

                        Console.WriteLine("{0} -", myProcess.ToString());
                        Console.WriteLine("-------------------------------------");

                        Console.WriteLine("  physical memory usage: {0}",
                            myProcess.WorkingSet64);
                        Console.WriteLine("  base priority: {0}",
                            myProcess.BasePriority);
                        Console.WriteLine("  priority class: {0}",
                            myProcess.PriorityClass);
                        Console.WriteLine("  user processor time: {0}",
                            myProcess.UserProcessorTime);
                        Console.WriteLine("  privileged processor time: {0}",
                            myProcess.PrivilegedProcessorTime);
                        Console.WriteLine("  total processor time: {0}",
                            myProcess.TotalProcessorTime);

                        // Update the values for the overall peak memory statistics.
                        peakPagedMem = myProcess.PeakPagedMemorySize64;
                        peakVirtualMem = myProcess.PeakVirtualMemorySize64;
                        peakWorkingSet = myProcess.PeakWorkingSet64;

                        if (myProcess.Responding)
                        {
                            Console.WriteLine("Status = Running");
                        }
                        else
                        {
                            Console.WriteLine("Status = Not Responding");
                        }
                    }
                }
                while (!myProcess.WaitForExit(1000));


                Console.WriteLine();
                Console.WriteLine("Process exit code: {0}", 
                    myProcess.ExitCode);
            
                // Display peak memory statistics for the process.
                Console.WriteLine("Peak physical memory usage of the process: {0}",
                    peakWorkingSet);
                Console.WriteLine("Peak paged memory usage of the process: {0}",
                    peakPagedMem);
                Console.WriteLine("Peak virtual memory usage of the process: {0}",
                    peakVirtualMem);

            } 
            finally
            {
                if (myProcess != null)
                {
                    myProcess.Close();
                }
            }
        }

    }
}

  • LinkDemand  for full trust for the immediate caller. This member cannot be used by partially trusted code.

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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