Hello, I'm having a problem with too low FPS on my server. I'm having dedicated server with i7 8700K (4.3GHz), 64GB RAM and 512GB NVMe SSD. I'm running rust server with LinuxGSM on Centos 8. No mods, maps size 4500 and I can't get over 150 FPS, when there are more than 40 players on the server the FPS is already below 10. Anyone know where could be the problem why I'm having so low FPS?

If you have unlimited server FPS then it's going to overload trying to give everyone a stupid amount of FPS. Limit the server FPS to 100 or even as low as 60 and you should have better performance all around. Nobody can tell the difference between 60 FPS and 200 FPS visually, it's just an ego trip to brag about the numbers.