Distant Horizons•4d ago

DHS causes huge lags and eventually stops my server

When my friend (who also uses DH installed on their client) joins my server it keeps generating LODs and server lags a lot. If I try manually running dhs pregen start world 0 0 110 it lags a lot, in the console I can see shortly before it stops:

[03:16:37] [Spigot Watchdog Thread/ERROR]: The server has stopped responding! This is (probably) not a Spigot bug.
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you see a plugin in the Server thread dump below, then please report it to that author
[03:16:37] [Spigot Watchdog Thread/ERROR]:       *Especially* if it looks like HTTP or MySQL operations are occurring
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you see a world save or edit, then it means you did far more than your server can handle at once
[03:16:37] [Spigot Watchdog Thread/ERROR]:       If this is the case, consider increasing timeout-time in spigot.yml but note that this will replace the crash with LARGE lag spikes
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you are unsure or still think this is a Spigot bug, please report to https://www.spigotmc.org/
[03:16:37] [Spigot Watchdog Thread/ERROR]: Be sure to include ALL relevant console errors and Minecraft crash reports
[03:16:37] [Spigot Watchdog Thread/ERROR]: Spigot version: 4533-Spigot-7c52c66-e703c03 (MC: 1.21.8)

[03:16:37] [Spigot Watchdog Thread/ERROR]: The server has stopped responding! This is (probably) not a Spigot bug.
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you see a plugin in the Server thread dump below, then please report it to that author
[03:16:37] [Spigot Watchdog Thread/ERROR]:       *Especially* if it looks like HTTP or MySQL operations are occurring
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you see a world save or edit, then it means you did far more than your server can handle at once
[03:16:37] [Spigot Watchdog Thread/ERROR]:       If this is the case, consider increasing timeout-time in spigot.yml but note that this will replace the crash with LARGE lag spikes
[03:16:37] [Spigot Watchdog Thread/ERROR]: If you are unsure or still think this is a Spigot bug, please report to https://www.spigotmc.org/
[03:16:37] [Spigot Watchdog Thread/ERROR]: Be sure to include ALL relevant console errors and Minecraft crash reports
[03:16:37] [Spigot Watchdog Thread/ERROR]: Spigot version: 4533-Spigot-7c52c66-e703c03 (MC: 1.21.8)

and then additionally:

[03:16:41] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 71429ms or 1428 ticks behind

[03:16:41] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 71429ms or 1428 ticks behind

I've already tried changing settings in the config file:

render_distance: 128
scheduler_threads: 8
generate_new_chunks: true

render_distance: 128
scheduler_threads: 8
generate_new_chunks: true

I've already tried following https://discord.com/channels/881614130614767666/1035937626944962641/1350101909683572736 and https://gitlab.com/distant-horizons-team/distant-horizons-server-plugin/-/wikis/home and currently all I can do to play with friends is /dhs pause as lags are unbearable

Solution:

Use a server software that has asynchronous world generation, like Paper

Jump to solution

14 Replies

Puhpine•4d ago

how much ram does the server have allocated? what hardware is running your server?

Miki_P98•4d ago

Try reducing the thread count

❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠⎝⧹\OP•4d ago

Do you mean scheduler_threads: 8 to like 1 or 2 ? I tried that, it was 4 by default, now set to 8 and no difference

java -Xms16G -Xmx16G -XX:+UseZGC -XX:+UseCompactObjectHeaders -jar spigot-1.21.8.jar nogui

java -Xms16G -Xmx16G -XX:+UseZGC -XX:+UseCompactObjectHeaders -jar spigot-1.21.8.jar nogui

Command that I use to start, I have AMD 7800X3D and memory 64 GB 6000 MHz

Miki_P98•4d ago

8 should use twice the memory and CPU resources of 4 2 will use half Decreasing the lag Try setting it to 1

Jckf•4d ago

You have not followed the recommendations of the wiki, which I directly advised in your previous post. Your server undoubtedly prints a warning stating that "performance will suffer" ever time you start it The reason you get lag is worldgen. It is triggered by DHS, but not directly caused by it

Solution

Jckf•4d ago

Use a server software that has asynchronous world generation, like Paper

Jckf•4d ago

And/or pregen your world Both of these recommendations are on the wiki

❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠⎝⧹\OP•4d ago

Okay, I'm looking at https://gitlab.com/distant-horizons-team/distant-horizons-server-plugin/-/wikis/Recommended-setup again and it says This pretty much rules out Spigot or any direct fork of Spigot, except Paper So you're telling the solution is to remove Spigot and make the server again using Paper?

Jckf•4d ago

You don't need to recreate anything. Just replace your server.jar with one from Paper It's a drop-in replacement

❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠⎝⧹\OP•4d ago

# Should new chunks be generated to build LODs?
# If you disable this, the plugin will not be able to create LODs in areas where chunks don't already exist.
# Optional.
# Default: true
generate_new_chunks: true

# Should new chunks be generated to build LODs?
# If you disable this, the plugin will not be able to create LODs in areas where chunks don't already exist.
# Optional.
# Default: true
generate_new_chunks: true

Doesn't DHS do that? I thought if I set this option it'll generate world chunks as well as LODs Okay, I'll try that, thanks!

Jckf•4d ago

It does, but areas that are pre-generated will be much faster to generate LODs for afterwards If you tune DHS for your hardware, it is possible to get essentially the same performance as Chunky. But it is easier to just recommend Chunky

❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠⎝⧹\OP•4d ago

After replacing Spigot with Paper it seems to work better, there are colors in the console now LOL I'm still testing... And it doesn't lag the server when I run DHS pregen!

Jckf•4d ago

Haha, yes there is a reason the wiki says to avoid Spigot And that the plugin prints "performance will suffer" when it doesn't detect a server capable of async worldgen But I guess it was difficult to see that warning if you didn't have colors in the console before

❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠⎝⧹\OP•4d ago

Yes, you're right. I didn't notice it at all, when I start the server the console is bloated with a wall of text, now you told me and I check and indeed it was warning me. I also didn't notice the notice

we recommend that you go with one that has asynchronous chunk loading. This pretty much rules out Spigot or any direct fork of Spigot, except Paper

I was going straight below to copy these Java flags. Thanks a lot for helping me, it seems this issue is resolved :distanthorizons:

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DHS causes huge lags and eventually stops my server

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