Performance issues – High CPU load

Hi,

a week ago on Mar 7th, we activated WP Statistics on a high volume website (nacional.hr) which is visited by 1.1M users per month and we started experiencing very high CPU loads since the activation – see below:

The website is hosted on Digital Ocean and before the plugin was activated, the CPU load was in range 15-45%. After the activation, it was reaching all the way to 100%.

We deactivated the plugin today and immediately experienced a drop in CPU load to range of values that we had before Mar 7th.

What approach would you advise in order to try and solve this issue?

Thank you!

The page I need help with: [log in to see the link]