get app domain memory usage

app-memory

<%@ Page Language="C#" AutoEventWireup="true" ViewStateMode="Disabled" Inherits="System.Web.UI.Page" %>

<%@ Import Namespace="System.Diagnostics" %>
<script runat="server">
    //http://stackoverflow.com/questions/2611141/calculate-private-working-set-memory-using-c-sharp
    //http://cybernetnews.com/cybernotes-windows-memory-usage-explained/
    //http://blogs.technet.com/b/askperf/archive/2010/03/30/perfmon-identifying-processes-by-pid-instead-of-instance.aspx
    //http://msdn.microsoft.com/en-us/library/aa965225%28VS.85%29.aspx

    protected void Page_Load(object sender, EventArgs e)
    {
        var os = System.Environment.OSVersion;
        var proc = Process.GetCurrentProcess();
        if (os.Platform != PlatformID.Win32NT)
        {
            return;
        }

        if (os.Version.Major >= 6)
        {
            // for windows 2008 later server, we get the dedicate memory usage as TaskMgr result
            var prcName = GetNameToUseForMemory(proc);
            var counter = new PerformanceCounter("Process", "Working Set - Private", prcName);
            Response.Write("Private Working Set:" + counter.RawValue / 1024);
        }
        else
        {
            // for windows 2003 web server, we just show as TasgMgr same result, it include shared memory
            // it's hard to get the private workingSet
            Response.Write("Working Set:" + proc.WorkingSet64 / 1024);
        }
    }

    private string GetNameToUseForMemory(Process proc)
    {
        var nameToUseForMemory = String.Empty;
        var category = new PerformanceCounterCategory("Process");
        var instanceNames = category.GetInstanceNames().Where(x => x.Contains(proc.ProcessName));
        foreach (var instanceName in instanceNames)
        {
            using (var performanceCounter = new PerformanceCounter("Process", "ID Process", instanceName, true))
            {
                if (performanceCounter.RawValue != proc.Id)
                    continue;
                nameToUseForMemory = instanceName;
                break;
            }
        }
        
        return nameToUseForMemory;
    }
</script>