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My server dips sometimes when generating chunks

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West African Lion posted this in #questions
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West African LionOP
Hi everyone.

So... almost a week ago i bought a HP Prodesk 400 g4 DM, is a mini PC.

It has a i3-8100T, 12GB ddr4 2666MT/s and a 120GB Chinese Sata SSD running debian 13, using Amazon Corretto 21.

The server has 87 mods, most of those are mobs, dungeons and biomes, but the same problem applies for vanilla server with paper.

Im using Chunky to generate chunks since yesterday, it is generating 25,000 blocks.

The deal is that i saw it is generating 14 to 15 chunks as normal, but sometimes it dumps down to 3 chunks, and the server cpu usage goes down to 15% for like 5 or 10 minutes, then it goes up.

Is it Chunky? Is it the way Minecraft generates chunks? Is it my JVM parameters? Please let me know, it has been like 13 hours and it only generated like 10% of the world
Asiatic Lion
Chunky entirely depends on how good your CPU is
I think an i3 is probably very weak for that
@Asiatic Lion Chunky entirely depends on how good your CPU is
West African LionOP
yea, but, what about the dips i mention?
from 13 chunks/s to 3 chunks/s
the CPU going from 80% to 13% usage
and that happens for like 5 to 10 minutes and sometimes for more time.
@West African Lion from 13 chunks/s to 3 chunks/s
Pixiebob
Not all generation is crated equal. Biome with larger structures will take longer to generate. This is completely normal.
CPU usage is also not an ideal way of any meaningful measurement of work done. The console message from chunky is the only reliable info you should trust.
Chunk generation is like a chain reaction that has an order of operation. C cannot start until B is done and B cannot finish until A is fully generated. As such, you will probably never see full cpu utilization during the generation process.
@Pixiebob Chunk generation is like a chain reaction that has an order of operation. C cannot start until B is done and B cannot finish until A is fully generated. As such, you will probably never see full cpu utilization during the generation process.
West African LionOP
Okey, now i understand, but, isnt there a way to make world generation faster? im planing to buy a WD Nvme PCI Gen 3, will that accelerate the Chunk generation process?
Pixiebob
Also the cpu you are using is not only dated but it was release as low cost hardware for low power processor workload. It was not an ideal choice 7 years ago for modern Minecraft server, even less so now.
Yes
By having modern cpu designed for gaming.
Your bottleneck is the cpu itself. Buying faster storage will not help.
@Pixiebob Your bottleneck is the cpu itself. Buying faster storage will not help.
West African LionOP
Will a Non T CPU help? Cause the T processors doesnt have Turbo Boost, something like a i5 8500?
Pixiebob
That will certainly be better
Do you have a gaming pc at home?
If so, use it to generate will almost always be better if you are self hosting.
Anything Ryzen in recent year will do a good job
West African LionOP
How i didnt think about that, well thanks
Im gonna do that
Pixiebob
Generate it and transfer file over
The following faq will only apply to modern CPUs: https://github.com/pop4959/Chunky/wiki/FAQ
mango
broski long story short, get a cheap vps for 5 bucks a month and it will perform better than whatever thing you bought
@Tamz $5 a month is going to be worse
mango
i know a host which offers 2 vcores of a 7900 with 6GB DDR5, 50GB NVMe

sure its not much but that cpu alone is gonna outperform that 8100T by a multiverse
@Tamz what host is that
mango
german host dsh.gg
but the problem is, that i am a student, this month i got sufficient money to buy that, but i dont know next month, i dont have a passive neither an active income
thats why i bought that
and im not a US Citizen, so, its worse because in my country we dont use USD
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