Hey there! Nginx configures the caching per-user, so it is possible to setup a different value for each user on the machine. You'll find that configured in /etc/nginx/conf.d/users/username.conf, with the following default value:
proxy_cache_path /var/cache/ea-nginx/proxy/username levels=1:2 keys_zone=username:10m inactive=60m;
Details on the different values in that file can be found here:
Performance is critical to success, and caching is one basic tool for improving it. Learn all about caching with NGINX and NGINX Plus.
www.nginx.com
and details about how to work with them in cPanel are located here:
This document explains how to install NGINX with Reverse Proxy on a server that runs cPanel & WHM and EasyApache 4.
docs.cpanel.net
Let me know if that helps!