A console app to print the current memory usage of all worker processes of an IIS app-pool.

WtfApp.cs

using System;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;
using Microsoft.Web.Administration;

namespace WtfApp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var applicationPoolName = args[0];

            var message = new StringBuilder();

            for (;;)
            {
                var processes = new ServerManager().ApplicationPools
                    .Where(ap => ap.Name == applicationPoolName)
                    .SelectMany(ap => ap.WorkerProcesses)
                    .Select(wp => wp.ProcessId)
                    .OrderBy(processId => processId)
                    .Select(Process.GetProcessById)
                    ;

                message.Length = 0;
                message.Append(DateTime.Now).Append(" ");
                foreach (var process in processes)
                {
                    message.AppendFormat("Id. {0} @ {1}MB ", process.Id, process.PrivateMemorySize64/(1024*1024));
                }
                Console.WriteLine(message.ToString());

                Thread.Sleep(1000);
            }
        }
    }
}