My website has an average of 350.000.000 pageviews per month and I need historical stats saved for at least 1 year.
How big the database would be after 4Bi pageviews?
How powerful the database server would need to be?
Did anyone ever accomplish something like that?
Best Regards,
Hi there,
Sure, many Piwik servers are as big as this, and even bigger 
we wrote a guide with pointers at: How to configure Piwik for speed - Analytics Platform - Matomo
if you have further questions or feedback feel free to leave feedback here or on the documentation page directly (via the feedback button at the bottom of each guide)