Footprints of Private and Shared Memories

This section provides a tutorial example on how to estimate footprints of private memory and shared memory of C# applications.

In order to get a better understanding of private memory and virtual memory usages, I wrote another tutorial example program called, MemoryIncreased.cs, to see changes on memory usages when more private data is requested.

// MemoryIncreased.cs
// Copyright (c) 2015, HerongYang.com, All Rights Reserved.

using System;
public class MemoryIncreased {
   public static void Main() {
      long[][] list;
      list = GetMegaBytes(1024);
   }
   public static long[][] GetMegaBytes(long max) {
      long[][] list = new long[max][];
      Console.WriteLine("Memory Usage: Data/Private/Virtual/WS");
      for (int n=0; n<max; n++) {
         PrintUsage(n);
         list[n] = new long[1024*128];
      }
      return list;
   }
   public static void PrintUsage(long n) {
      System.Diagnostics.Process proc 
         = System.Diagnostics.Process.GetCurrentProcess();
      Console.Write("{0} / ", n*1024*1024);
      Console.Write("{0} / ", proc.PrivateMemorySize64);
      Console.Write("{0} / ", proc.VirtualMemorySize64);
      Console.Write("{0} / ", proc.WorkingSet64);
      Console.WriteLine();
   }
}

I compiled it with .NET 4 C# compiler and got this output:

C:\herong>\windows\Microsoft.NET\Framework\v4.0.30319\csc 
   MemoryIncreased.cs

C:\herong>MemoryIncreased.exe

Memory Usage: #/Data/Private/Virtual/WS
   0 /          0 /    8753152 /   89227264 /   5799936 / 
   1 /    1048576 /   10072064 /   89227264 /   6225920 / 
   2 /    2097152 /   11448320 /   89227264 /   6508544 / 
   3 /    3145728 /   12627968 /   89227264 /   6774784 / 
   4 /    4194304 /   13807616 /   89227264 /   6909952 / 
   5 /    5242880 /   14987264 /   89227264 /   7049216 / 
   6 /    6291456 /   16035840 /   89227264 /   7065600 / 
   7 /    7340032 /   17215488 /   89227264 /   7204864 / 
   8 /    8388608 /   18395136 /   89227264 /   7344128 / 
   9 /    9437184 /   19574784 /   89227264 /   7479296 / 
  10 /   10485760 /   20885504 /   89227264 /   7757824 / 
  11 /   11534336 /   22196224 /   89227264 /   8032256 / 
  12 /   12582912 /   23506944 /   89227264 /   8323072 / 
  13 /   13631488 /   24883200 /   89227264 /   8605696 / 
  14 /   14680064 /   26193920 /   89227264 /   8888320 / 
  15 /   15728640 /   28790784 /  107249664 /   9216000 / 
  16 /   16777216 /   30101504 /  107249664 /   9502720 / 
  17 /   17825792 /   30756864 /  106594304 /  10043392 / 
  18 /   18874368 /   31936512 /  106594304 /  10182656 / 
  19 /   19922944 /   33116160 /  106594304 /  10317824 / 
  20 /   20971520 /   34295808 /  106594304 /  10457088 / 
  21 /   22020096 /   35475456 /  106594304 /  10592256 / 
  22 /   23068672 /   36655104 /  106594304 /  10731520 / 
  23 /   24117248 /   37834752 /  106594304 /  10870784 / 
  24 /   25165824 /   39014400 /  106594304 /  11005952 / 
  25 /   26214400 /   40062976 /  106594304 /  11059200 / 
  26 /   27262976 /   41111552 /  106594304 /  11063296 / 
  27 /   28311552 /   42160128 /  106594304 /  11071488 / 
  28 /   29360128 /   43208704 /  106594304 /  11075584 / 
  29 /   30408704 /   46858240 /  125796352 /  11239424 / 
  30 /   31457280 /   48037888 /  125796352 /  11374592 / 
...
1014 / 1063256064 / 1228591104 / 1300529152 / 147308544 / 
1015 / 1064304640 / 1229770752 / 1300529152 / 147447808 / 
1016 / 1065353216 / 1230950400 / 1300529152 / 147603456 / 
1017 / 1066401792 / 1232130048 / 1300529152 / 147738624 / 
1018 / 1067450368 / 1233350656 / 1317306368 / 147886080 / 
1019 / 1068498944 / 1234530304 / 1317306368 / 148021248 / 
1020 / 1069547520 / 1235709952 / 1317306368 / 148160512 / 
1021 / 1070596096 / 1236889600 / 1317306368 / 148295680 / 
1022 / 1071644672 / 1238069248 / 1317306368 / 148434944 / 
1023 / 1072693248 / 1239248896 / 1317306368 / 148574208 / 

The output shows that:

Last update: 2015.

Table of Contents

 About This Book

 Introduction of C# (C Sharp)

 Data Type and Variables

 Logical Expressions and Conditional Statements

 Arrays and Loop Statements

 Data Type Features

 Floating-Point Data Types

 Passing Parameters to Methods

 Execution Environment Class

 Visual C# 2010 Express Edition

 Class Features

 C# Compiler and Intermediate Language

 Compiling C# Source Code Files

 MSBuild - Microsoft Build Engine

Memory Usages of Processes

 Using "Process" Class to Show Memory Usages

 Private/Virtual Memory and Working Set

Footprints of Private and Shared Memories

 Virtual Memory Upper Limit

 Memory Report from Windows Task Manager

 Memory Report from Performance Console

 Multithreading in C#

 Async Feature from C# 5

 System.IO.FileInfo Class

 System.Diagnostics.FileVersionInfo Class

 WPF - Windows Presentation Foundation

 Partial Classes and Partial Methods

 Outdated Tutorials

 References

 PDF Printing Version