gistfile1.cs

class Program
{
    static int bats = 0;
    static int frogs = 0;

    static void Main(string[] args)
    {
        using (var store = new EmbeddableDocumentStore())
        {
            store.Initialize();

            IndexCreation.CreateIndexes(typeof(Program).Assembly, store);

            ThreadPool.QueueUserWorkItem(delegate
            {
                var i = 0; 
                while (true)
                {
                    Thread.Sleep(1000);
                    i++;
                    using (var session = store.OpenSession())
                    {
                        if (i % 2 == 1)
                        {
                            session.Store(new Frog { Name = "Frog " + i });
                            session.SaveChanges();
                            frogs++;
                        }
                        else
                        {
                            //session.Store(new Bat { Name = "Bat " + i });
                            //session.SaveChanges();
                            //bats++;
                        }
                    }
                }
            });

            while (true)
            {
                Thread.Sleep(100);

                var stats = store.DatabaseCommands.GetStatistics();
                Console.Clear();
                Console.WriteLine("Bats:          " + bats);
                Console.WriteLine("Frogs:         " + frogs);
                Console.WriteLine("Stale indexes: " + string.Join(", ", stats.StaleIndexes));
                foreach (var ix in stats.Indexes) 
                {
                    Console.WriteLine(ix.Name + " etag: " + ix.LastIndexedEtag);    
                }
            }
        }

        
    }
}

public class Frog
{
    public string Name { get; set; }
}

public class Bat
{
    public string Name { get; set; }
}

public class Bats : AbstractIndexCreationTask<Bat>
{
    public Bats()
    {
        Map = bats => from b in bats
                      select new { b.Name };
    }
}

public class Frogs : AbstractIndexCreationTask<Frog>
{
    public Frogs()
    {
        Map = frogs => from f in frogs
                       select new { f.Name };
    }
}