Does anybody know what is the problem of lagging?

[wwwaffle965]

Stack trace

https://spark.lucko.me/POMOGny03N
(profile)
https://pastes.dev/zyzwF6iRsY
(lastest log)

Plugin and Datapack List

spark only

Actions to reproduce (if known)

start the server and when I connect, the server lags so much

Paper version

git-Paper-497 (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: d8d54d9 on ver/1.20.4)

Other

My server lags so badly whenever I connect and I also tried to inquire at the paper discord but couldn't get the solution. At first, we thought the problem was because the server some how only used 1 thread even it had authority to use all, but after adding some codes to the start bat file (-XX:ActiveProcessorCount=6), it is now up to 20 and the server lagging is still not solved

[codebycam]

Hi waffle, this doesn't seem to be an issue with Paper but an issue with your hardware (your spark still says there's only one CPU thread available). Also, 1.20.4 is outdated (unsupported) and vulnerable to abuse (exploit and crashes) - you can find the latest builds for 1.21.1 here.

I would recommend the likes of Syscraft, HelpChat and Admincraft when it comes to finding support for general issues of running a server.