So whenever any of my players use /seen to check any other player or what not it causes a 2~5 second lag spike. Idk if it has to do with having a lot of people who have joined the server like 100k+ or so. Is there anyway to prevent/fix this other than taking away the perm?

Did you check your IO activity while doing this command?

How do I do this?

5968a6b

Confirmed.
Thanks for looking into @vemacs
👍