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Number of users whose use of the application resulted in a Facebook API call Total number of application canvas page views Total number of users who viewed at least one of an application s canvas pages The average time required to finish an individual HTTP request for the application s canvas pages The average time is took Facebook to render the application s canvas pages The number of users who blocked the application The number of users who unblocked the application Total number of API calls made by the application Number of users whose use of the application resulted in a Facebook API call (alias)
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The next tab, HTTP Request, has three sections: the status codes summary, recent HTTP requests, and a graph of an HTTP status codes returned over the selected time period Figure 144 shows the status code summary and recent HTTP requestsThe summary shows that most requests that are returned are status code 200, which is great;
Metrics Dashboards
however, almost 25 percent of those return no data, which is something that the developer might want to look intoThe recent requests show the full URL for the HTTP request, which can help diagnose problems
Figure 143 The Facebook Insights tool shows data for different time periods Here, it shows Active Users (Engagement) for a popular Facebook application
Figure 145 displays trend data for individual HTTP status codesThis can be useful to look through, because patterns in usage or errors show up that might not otherwise be found Table 144 correlates the name of the HTTP request metric in the Insights tool with the name used for it when using the API Only some of the status codes are discussed here Facebook provides metrics for all the major HTTP status codes supported by the protocol
Table 144 Facebook Insights: HTTP Request Metrics Metric (API)
canvas_page_views _http_code_0 canvas_page_views _http_code_200
Metric (Insights)
HTTP Code 0 HTTP Code 200
Description
Total number of canvas pages that timed out while loading Total number of canvas pages that returned HTTP 200 (OK)
14 Measuring Application Success
Table 144
Facebook Insights: HTTP Request Metrics Metric (API)
canvas_page_views _http_code_200ND canvas_page_views _http_code_403 canvas_page_views _http_code_404 canvas_page_views _http_code_500
Metric (Insights)
HTTP Code 200 (ND) HTTP Code 403 HTTP Code 404 HTTP Code 500
Description
Total number of canvas pages that returned OK and no data Total number of canvas pages that returned HTTP 403 (Forbidden) Total number of canvas pages that returned HTTP 404 (Not Found) Total number of canvas pages that returned HTTP 500 (Internal Server Error)
The HTTP Request tab in Insights shows the status codes that the application has been returning
Finally, the Features tab shows metrics that are not currently available from the Facebook API and represents aggregated data for feature-based user interactions on Facebook as they relate to an application Dozens of metrics are available, too many to list in this section; however, some of them are incredibly useful because they are given nowhere else in Facebook, the API, or from third-party tools For example, Figure 146 shows the number of canvas page views for a popular Facebook application over a six-month period Figure 147 shows some of the unique metrics available on this tabThe major categories of these metrics are summarized in the following list:
Canvas Aggregated metrics for canvas pages, including total number of links clicked on all of an application s canvas pages and errors encountered when serving or viewing them
Metrics Dashboards
The HTTP Request tab in Insights also has a graph that shows the status codes that the application has been returning over time
The Features tab provides interesting metrics, such as a long historical view of total canvas page views
Feed Incredibly valuable, because this category provides developers with metrics telling how many times an application s users clicked the Publish or Cancel (Skip) buttons in Feed submission dialogs (from either Feed forms, Publishers, or other sources)As discussed in 9, Feed Stories, Feed Forms, and Templates, and 10, there is no way for developers to programmatically know whether a