Solved Great need of help - CPU 100% usage

[LeGeNdOfGoW]

Hello

I will write immediately that I am desperate here, we are trying to fix this problem for last 86h
After 2-6h server is starting to losing TPS, and procesor is getting to 100%

we checked everything, from overspawned mobs, to optimalization paper, spigot, etc

RAM on server is unlimited it can increase if server demant it
DISK SSD
RAM DDR4
Procesor AMD Ryzen 9 5900X - 2,5 cores

Server version paper 1.18.1

Last part is it gets on my nerves, there is no indication where the problem is, as i can see is chunks,
render distance is set already to 5, map size is 4k, and we aready prerender map with Chunky plugin eh

And this problem is crazy because the server works well even when there were over 40 people on it, then after 3-6 hours tps it drops to 10 and need reset

so where is problem here? we even delete all plugins to check if plugins are problem, but no, still tps drop after some H like crazy ;/
need more RAM? or something?

Thanks for any info about this, im very close to wipe server and start on 1.8.8 but then we will lose 90% player base

 

[LeGeNdOfGoW]

Maybe i need to change something here?

 chunk-loading:
    min-load-radius: 2
    max-concurrent-sends: 2
    autoconfig-send-distance: true
    target-player-chunk-send-rate: 100.0
    global-max-chunk-send-rate: -1.0
    enable-frustum-priority: false
    global-max-chunk-load-rate: -1.0
    player-max-concurrent-loads: 20.0
    global-max-concurrent-loads: 500.0

 

[electronicboy]

2.5 cores

artificial resource limiting is basically stupidly bad, especially for modern servers which churn CPU resources


You're using a stupidly old version of paper, noting that those chunk loading settings you're looking at won't even work in that version of paper, update.

Note the red text on timings, you're having memory issues, parallel GC hasn't been recommended for usage in standard servers for years

 

[LeGeNdOfGoW]

The problem was fixed after changing java flags to:

flags: -Xms8192M -Xmx8192M -XX:+UseG1GC

is there anything else worth adding here?