datadog wmi check config for IIS request queue

Wmi Check

    -   class: Win32_PerfFormattedData_ASPNET_ASPNET
        metrics:
            -   [RequestsCurrent, iis.asp.RequestsCurrent, gauge]
            -   [RequestsInNativeQueue, iis.asp.RequestsInNativeQueue, gauge]
            -   [RequestsQueued, iis.asp.RequestsQueued, gauge]
            -   [RequestsRejected, iis.asp.RequestsRejected, gauge]
            -   [RequestWaitTime, iis.asp.RequestWaitTime, gauge]
        tag_by: Name
        
        # i have a mixed web-api (90%) and MVC (10%) app running on Windows Server 2012 / IIS 8 on .NET 4.5.2
        # what i'm trying to track is if any requests are getting queued and/or rejected.
        # and i think the best source for those metrics is from "HTTP Service Request Queues"
        # from here: http://msdn.microsoft.com/en-us/library/windows/desktop/cc307239(v=vs.85).aspx
        # but, i cannot find those im WMI.
        # those ASP.NET stats also give data but they weren't matching up 100% with "HTTP Service Request Queues",
        # so I'm not sure which are more accurate or what the difference is. It could just be timing / rate of measurement.