#668 – GetTotalMemory Indicates How Much Memory You’ve Allocated

You can call the GC.GetTotalMemory function to find out the total # bytes you’ve allocated so far on the managed heap.  Note that this number does not include other memory that your process may have allocated, including things like memory allocated in unmanaged code.

        static void Main()
        {
            try
            {
#if DEBUG
                GC.Collect();
#endif
                Console.WriteLine(string.Format("Before we start, total mem alloc'd {0} bytes", GC.GetTotalMemory(false)));

                while (true)
                {
                    ConsoleKeyInfo cki = Console.ReadKey();

                    int size = 1024 * 1024 * 100;  // 100MB
                    byte[] data = new byte[size];

                    Array.Clear(data, 0, size);

                    _bigList.Add(data);

#if DEBUG
                    GC.Collect();
#endif
                    Console.WriteLine(string.Format("Total mem alloc'd now {0} bytes", GC.GetTotalMemory(false)));
                }
            }
            catch (Exception xx)
            {
                Console.WriteLine(xx.ToString());
                Console.ReadLine();
                }
        }

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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

2 Responses to #668 – GetTotalMemory Indicates How Much Memory You’ve Allocated

  1. David says:

    The comment should be “// 100MB”.

    • Sean says:

      Thanks David. Corrected. Technically, Mebibyte rather than Megabyte. But no self-respecting software developer would stoop low enough to nit-pick decimal vs. binary version of MB.

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