Server Memory Optimization

I'm facing an issue with RAM usage on my dedicated server running Alma Linux 8. Each deployment of my Java Spring Boot web applications, which are run through Tomcat and Nginx, leads to an increment in RAM usage that never decreases. It's becoming critical as we are nearing the server's memory limit.

What I need is a one-time solution to this issue, alongside a future-proof setup to prevent this from recurring.

Key Requirements:

- Expert in memory optimization

- Familiar with Java Spring Boot, Tomcat, Nginx

- Capable of setting up a sustainable solution

- Experience with managing and optimizing Linux servers

Please note that my understanding of JVM tuning and memory management is at a beginner level. Therefore, clear and simple explanations of the implemented solutions will be appreciated.