Can I export statistics from the portal? I can display stats on things like db connections, reads, writes, etc., but can I export them? In a word,Yes!
Chronograf
You can export Portal data in two ways. If you have access to Chronograf in the left menu on the ProTop Portal:
Here is a quick Chronograf tutorial.
Once you have the query that works for you, in the upper right, you'll see the option to download a CSV:
Trend Charts
You can also export data directly from the trend charts. Click the label in the top center of any chart to see these dropdown options, including Export CSV: