Minecraft server not using the resources it need

[tawny topaz]

I had to do a clean reinstall of the Pterodactyl and my ATM8 Minecraft server, which used to take around 14G of ram and close to 400% CPU, now never goes above 100% cpu and 7.5G ram.
This causes the server to run extremely poorly as it doesn't take the resources it needs even when im allowing it to.
My settings are the exact same as they used to be as far as i can tell.
I've allowed 18Gib total to the server in terms of ram and infinite use of the CPU.
My startup arguments are as follows: java -Xms14G -Xmx14G -XX:MaxRAMPercentage=95.0 -Dterminal.jline=false -Dterminal.ansi=true $( [[ ! -f unix_args.txt ]] && printf %s "-jar server.jar" || printf %s "@unix_args.txt" )
My user_jvm_arg also includes the -Xms14G -Xmx14G.
I tried moving around the xmx/xms settings on both sides and nothing changes.

[feral moon]

How did you set your cpu pinning?

[tawny topaz]

cpu pinning is 0

[tawny topaz]

I assumed that putting cpu pinning at 0 allowed it to use as much as it wants but i might be wrong, im pretty new to this.

[feral moon]

Yeah, putting 0 would mean only the 0 core. If you had a server with the “exact same” settings before, it wouldn’t reach about 100% usage

[tawny topaz]

what would be a good thing to set it as if i have a 4c/8t CPU?
Also got any idea about the ram? It seems to be the thing slowing down the server the most.

[feral moon]

I usually just leave cpu pinning blank. The rest usually just depends on how much the server needs. Give it more cpu and then see if ram is your problem. Usually Java will gulp down whatever you let it

[tawny topaz]

Thank you so much! It appears the CPU was bottlenecking the whole server, now that it has unlimited, RAM usage went up too!

[feral moon]

Yeah, that sounds about right