My wordpress site don't work.

When I entered the control panel, my CPU usage reached 100%.

I received a message about "Meltdown and Specter" from digitalocean and applied the patch.
(https://www.digitalocean.com/community/tutorials/how-to-protect-your-server-against-the-meltdown-and-spectre-vulnerabilities)

CPU usage has been reduced, but wordpress still does not work.

How can I fix this?