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Issue Description
minecraft freezes on random for 1-5 minutes and uses all disk transfer speed (3-6MB/s)

Modpack version (Do not use "latest")

1.54

Logs

If applicable, please upload your crash report, or latest.log to gist.
https://gist.github.com/antrobot1234/e8bc18c9e45730a25a0f1593f641b1e7
Screenshots

If applicable, add screenshots to help explain your problem.

Additional context

Add any other context about the problem here.

Thanks for the report.

How much RAM does the server you're on have allocated?

6gb ram

Can you reproduce it in SP? It kinda looks like your internet speed is throttling your connection.

I am hosting the world via lan connection. Server/client lag On a WiFi front should not be an issue on my end.

Oh it's a LAN world, not a dedicated server?

https://gist.github.com/antrobot1234/e3d76bd09ca05817b6258067885313ad
singleplayer freezing proof

Gist

single player freeze proof

single player freeze proof. GitHub Gist: instantly share code, notes, and snippets.

Yes. It’s a world I’m hosting via lan and forwarded via hamachi to play with a friend of mine.

That pretty much explains it. Your PC has tons of operations to take care of, you're most likely overburdening it.

then why is it freezing for minutes on end and running fine the rest of the time instead of running slow in general

There could be a number of reasons. The world doesn't save all the time, I don't know how often LAN worlds save. I highly recommend that you get yourself a dedicated server.

if i could prove this happens in Singeplayer too, would you re-open the issue?

Yep absolutely.

There is nothing in that log that proves that you're freezing. There is mention of a chunk that is taxing to render, but that's about it. Try increasing allocated RAM to 7GB, and add these java arguments:
-XX:+UseG1GC -Dsun.rmi.dgc.server.gcInterval=2147483646 -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M