This object indicates the total number of SharePoint Pre-fetch optimized HTTP sessions. This counter is incremented for every session on which SharePoint pre-fetch optimization can be performed. An HTTP session is tagged as a SharePoint pre-fetch Session based on the information present in the HTTP request. A pre-fetch operation is one where the edge WAAS device fetches the next set of data (which it anticipates the client will request later) from the server based on the current HTTP Request information.