Laravel server memory is increasing constantly

Hi, I have a server at DigitalOcean hosting three Laravel projects. In the last few days, I've noticed that the memory usage is steadily increasing, and when it almost reaches 100%, it suddenly drops. It does this in a loop. Initially, I thought the server might be too small, so I decided to upgrade the memory and CPU. However, I have noticed that the problem persists, and the memory consumption keeps increasing. I contacted DigitalOcean, and they suggested that it might be a malware problem. I would like to ask them what I can do in these cases?