Server issues

[Yolopukki]

Dear Minecraft GURUs.

I am running my server and it lags, but does not uses the resources available. What should I do to make it run better?

https://imgur.com/a/XPRRwWt

Edited April 14, 2022 by Yolopukki

[LexManos]

The version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently supported versions are 1.18.1/1.18.2 (Latest) and 1.16.5 (LTS).