A common question I have received is how you can easily increase your offload or caching. With these basic steps, you are able to get the data you need and might find out that you can easily increase caching more content.
The critical first step here is to go to Monitor > Offload. This will open up the Monitoring view for all the offload you have. Besides the helpful graphs (sorted by CP Code, so be sure to pick the right ones or all of them) that show you the amount of volume and hits that we have helped offload, there are several widgets below. One of these is the Top URLs widget.
As mentioned, please take notice of the Volume/Hits pulldown as this will change the content based on the amount of hits. For offload, you either want to get as much offload on the hits or the volume on your origin.
Important to notice here is the little button, clicking on this allows you to download a CSV file of the Top 500 URLs for either volume or hits. By opening this CSV in your favorite CSV tool and applying a filter on the offload percentage, make sure to looks for the URLS that have 0 (or 0% offload).
Here is the CSV file (I reduced the URLs to font size 1 for this screenshot). Add a filter on the columns.
Sort the percentage on Ascending to show those 0% offload at the top!
And there you go, all the URLs that have a 0% offload. (Again reduced to font size 1 for the screenshot).
This should give you a good start, perhaps you are not caching font types or a certain file type. Maybe the Cache-Control Headers set on your origin are missing that one page that can easily be cached. Or perhaps these URLs are sending the Vary header which are always tricky!
I hope this helps to increase your offload!