Running gmod server on debian

I’m start to host my server on debian, but after server works for 7-10 hours it start to load cpu to 90%.
No matter how much player on it 32 or 1 srcds load cpu on 80-90% and doesn’t change the load after players left game.
Why this happening maybe any solution to cleanup or something?
I fix this by restart but its not a good solution.

Gamemode: Clear darkrp without any modes
Admin mod: ULX

It sounds like a memory leak, but I don’t see how it could be if you are running a clean RP.

Iv got 4gb memory