Currently, I have 13 separate WordPress sites (different domains) hosted on 2GB RAM, 1CPU server, SSD server (PHP7.4 - default).
3 WordPress blogs in this server receive around 100 - 200 daily users, another site gets around 30 daily visitors and other sites have less than 20 daily visitors. All of these sites use FastCGI cache.
These sites' traffic grows up day by day.
I would like to know that is it improves the site's overall performance by using multiple php pool (multiple PHP listeners) in this situation (more than 2 PHP listeners)?
When I'm testing the site using Google pagespeed insight it shows the reduce server response time warning.