Best Setting AApanel for My Dedicated?

I have a dedicated server with specs like this

Intel® Xeon® D-1531
32GB RAM
250GB SSD

But server CPU usage is always high above 30%, even though it only handles 400 online visitors at the same time.

What settings are best for my DS?

This is my current setting

Hello, the configuration of PHP cannot exceed the physical memory. You can check the slow log and current status or load of PHP and mysql.