Machine-implemented methods for troubleshooting a web site analytics configuration are provided. In one aspect, a method includes acquiring low latency web site traffic data for a web page for a web site, and comparing the low latency web site traffic data with historical web site traffic data for the web page. The method also includes determining a difference between the low latency web site traffic data and the historical web site traffic data based on the comparison, and sending information on the difference between the low latency web site traffic data and the historical web site traffic data. Systems, graphical user interfaces, and machine-readable media are also provided.