Process.PeakVirtualMemorySize64 Property

Gets the maximum amount of virtual memory used by the associated process.

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

[ComVisibleAttribute(false)]
public long PeakVirtualMemorySize64 { get; }

Property Value

Type: System.Int64
The maximum amount of virtual memory, in bytes, allocated for the associated process since it was started.

ExceptionCondition
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 maximum size of virtual memory used by the process since it started. 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 Peak 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);
                        Console.WriteLine("  PagedSystemMemorySize64: {0}",
                            myProcess.PagedSystemMemorySize64);
                        Console.WriteLine("  PagedMemorySize64: {0}",
                           myProcess.PagedMemorySize64);

                        // 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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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