Protect the system from buggy apps

[Navraj Chohan]

The following lines of code in my test app was able to take up all the CPU (4 cores at 100 percent even after the requests had stopped):

    greetings = db.GqlQuery("SELECT * "
                            "FROM Greeting "
                            "ORDER BY date DESC")
    results = greetings.fetch(limit=1000)
    while len(results) != 0:
      results = greetings.fetch(limit=1000)

Where I already created 1000 items before hand. We want to detect when an application has gone rouge and report it to the sys admin when using too many resources.