AWS server CPU utilization is excessive with DIVI Theme

Hello Team,

Good evening.

I would like to inform you all that we have transferred one of our Wordpress websites from WP Engine managed Wordpress to the AWS server hosting with the below configuration.

CPU: 4 Core
Memory: 8 GB
PHP Version: 8.2
Wordpress Version: 6.6.2
EC2 Instance Type: c5.xLarge

Currently, we are facing issues on the server that it is only able to handle 50 concurrent users on the website and if the number of users increases then the server is terminated and replaced with a new instance and CPU utilization reaches 90%. As per the analysis, the above server configuration can handle around 200 concurrent users with CPU utilization in the range of 20-30% only.

We have checked everything on the server end and found that it is properly configured but the issue persists. We are using a DIVI theme on our Wordpress website & if we change the theme to the default Wordpress theme from the admin then the website is working properly. We have also checked the issue by disabling and enabling all the plugins one by one but didn't find a solution.

So, I would require DIVI community members & team to help and suggest me to overcome this issue. Please let me know if you have any questions.