I've been trying my luck with the stable dayz server for Linux as we had to switch hosts.

We switched to a slightly more powerful hardware.

When we got live, the server performances quickly dropped far below our expectations and what we had on the previous windows host.
We could not find out why.
We reinstalled the server with windows in emergency and it automagically started running way better (and fine), with the same hardware

The server had a max pop of 75 but FPS dropped considerably past 40 and started struggling (less than 10 FPS, as low as 3) past 50 on linux
Hardware is Xeon E-2276G, 64go of ram, dual SSD raid

Not sure what extra information I can provide, let me know what you could potentially need
We still have a server running on linux for about 15 days, it will be empty in few days however
The server is completely vanilla, with few servermods. Disabling the servermods did not improve performances at all.