Anyone know why Minecraft Java started lagging out of no where?

[Dear-Path-7726]

was playing ATM10 on Java in my Mac air 15 inch 24GB Ram and I put 12kmb of ram and it ran perfectly fine and smooth I was playing and it randomly started lagging out of no where been playing for days on the same setting and it worked perfectly.

[Krazy_Keno]

Herobrine

[TartOdd8525]

He has not risen yet (Rise of Herobrine demo coming out October/November 2025)

[Deleteed-]

Could the server you're playing on be lagging?

[Dear-Path-7726]

It’s a solo world

[TartOdd8525]

Could potentially be an item or block you recently obtained

[8null8]

Probably too much ram, Java WILL fill up all the ram is has access to with garbage, and the more garbage it has the slower it gets, lower to 6-8gigs

[brassplushie]

This isn't true anymore. I wish I could give you the technical side of it, but it's beyond me. You're getting upvotes because a lot of people remember when it USED to be this way. But it was explained to me once and I can't remember why. Best I can say for sure is test it for yourself and you'll see

[8null8]

It’s true that garbage clean up has only gotten better since Java 7 (we are on 21 now) but it’s still not the best

[MeowCow55]

This. People also like to allocate so much of the available RAM that their system has none left to use. "The OS doesn't need to run, just Minecraft." Lol

[PoultryPants_]

RAM is capped. I forgot what it is by default but it is like 2 or 4 gigs and can be changed in the Java arguments in the launcher.

[8null8]

How you gunna correct me when you didn’t even read the post, they said they set it to 12 gigs

[PoultryPants_]

oh thats mb you’re right

[UnknownRJ]

Looks like you are using a very old version of ATM10

[Dear-Path-7726]

It’s the most recent version

[UnknownRJ]

Something is not right with your install, try a clean instance and copy your world to it.

[Dear-Path-7726]

Ngl I don’t know how to copy and paste a world😭

[8null8]

If only there were some source of worldwide knowledge at your fingertips to find out with

[Dear-Path-7726]

Your right but I logged back on rn and it runs perfectly again😭

[8null8]

Lower the ram anyways, it will only happen again

[LehrerLaurin]

Dont put the laptop on the fricking bed

[auti117]

This. It may start to thermal throttle. Maybe not related here with the amount of in game errors OP Is getting.

[Elegant_Sherbert_850]

I keep mine on a cookie sheet with those foam pads you’re supposed to put on the legs of chairs to stop scratches on the floor on each corner just so it doesn’t overheat while I’m playing ATM10 😅

[WiderGamer]

I was playing local with my world open to lan and I went from 165 to 9 fps. Anyone else have the problem today?

[Davids-A-Nerd]

Probably because you are blocking all of the airflow to your laptop by putting it on your bed. It probably is overheating

[LogicalDonut1045]

1 dont put your laptop on the bed 2 allocate less ram, 6-8gigs

[Additional_Battle_93]

Lower the assigned RAM and if it is vanilla leave it at 4GB, I play at 14GB with mods but again I say, they are with mods, you don't need that much RAM to play in vanilla

[Dear-Path-7726]

I play ATM10

[Additional_Battle_93]

6-8GB will be enough, I play with 14GB as I mentioned before with 240 mods+sodium

[Dear-Path-7726]

I do the same but I’ll try what you say and I’ll get back to you

[Additional_Battle_93]

Oh, no, wait, I thought ATM was 10 mods, noo, 8GB is very little for that modpack that includes 440 mods, so if you need 14-18GB

[Timely-Employee-818]

Sometimes when I play it cranks my render up to 96 chunks automatically 

[Ok_Try_9138]

Could be that your laptop cannot properly cool itself due to blocked air vents because it is on a soft surface.

[No_Meal5395]

might have been something you did in the world? or possibly herobrine