That works great if it is a free addon, but if it is a paid addon just be sure that it supports multiple domains and copying it does not violate the license terms and conditions.
How old and how many posts? As of now, 9,035 posts and 452 pages. https://jeep-cj.com/community/threads/what-did-you-do-to-or-with-your-cj-today.33108/
My pay system post with a spread sheet showing options. https://jeep-cj.com/community/threads/this-is-a-free-site-but-with-a-donators-and-supporters-bonus-percs-system.70190/post-573305
I am not sure about Ubuntu but you can limit your Java resources by setting (Almalinux).
-Xms
-Xmx
Try
-Xms1g
-Xmx1g
The values must be the same
Adjust as necessary.