Can't keep up! Is the server overloaded?

[naumoff]

Hello there! I'm not sure if I'm writing to the right topic, but I'm having a problem with the Minecraft server. The load on the server processor is less than 40%, but the Minecraft server lags very much with an error: "Can't keep up! Is the server overloaded? Running 14659ms or 293 ticks behind". At this moment I am on the server alone.
There are only 15 mods installed on the server:

Quote

Alex's Mobs
Artifacts
Citadel
Curios API
ExpandAbility
Falling Tree
Ice and Fire
Iron Chests
Iron Furnaces
Just Enough Items
TLSkinMod
ToroHealth Damage Indicators
Traveller's Backpack
The Twilight Forest
Xaero's Minimap

Also, once my server crashed. I attach the logs.
I have the recommended version "forge-1.16.5-36.1.0.jar" installed on my server.
Server characteristics: 8 GB Memory / 4 Intel vCPUs / 160 GB Disk.
I don't know how you can help me, but I decided to try my luck and write here. Thanks a lot in advance!
If you need more information, please ask me.

crash-2021-07-13_04.21.31-server.txt

Edited July 13, 2021 by naumoff

[naumoff]

The situation improved a little when I installed the latest version of the "Ice and Fire" mod, but there are still lags. Now the error "Can't keep up! Is the server overloaded?" is written much less often, but another error appeared: "player moved too quickly!", which made it almost impossible to move around the world.

Quote

[22:27:42] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class com.github.alexthe666.iceandfire.entity.EntityDragonBase from class com.github.alexthe666.iceandfire.entity.EntityLightningDragon
[22:27:42] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class com.github.alexthe666.iceandfire.entity.EntityDragonBase from class com.github.alexthe666.iceandfire.entity.EntityLightningDragon
[22:27:42] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class com.github.alexthe666.iceandfire.entity.EntityDragonBase from class com.github.alexthe666.iceandfire.entity.EntityLightningDragon
[22:27:42] [Server thread/WARN] [minecraft/EntityDataManager]: defineId called for: class com.github.alexthe666.iceandfire.entity.EntityDragonBase from class com.github.alexthe666.iceandfire.entity.EntityLightningDragon
[22:27:48] [Server thread/WARN] [minecraft/MinecraftServer]: Can't keep up! Is the server overloaded? Running 2008ms or 40 ticks behind
[22:27:57] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 9.940794178013789,-1.127890238205481,1.0335645639438553
[22:28:08] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 9.785573994629203,1.1661092609382138,2.1636089161856944
[22:28:14] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 9.726472322186964,2.164773281826072,1.7895358752814445
[22:28:20] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 10.144602241049256,1.9986640208878583,0.008243357354785985
[22:28:28] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 9.889900487736554,2.395575898673286,-0.22144524983673364
[22:28:34] [Server thread/WARN] [minecraft/ServerPlayNetHandler]: player moved too quickly! 10.33232332823934,1.4199999868869781,-0.7320723419413753


[22:42:53] [Server thread/WARN] [minecraft/Chunk]: Tried to load a DUMMY block entity @ BlockPos{x=-289, y=35, z=869} but found not block entity block Block{minecraft:stone} at location
[22:42:53] [Server thread/WARN] [minecraft/Chunk]: Tried to load a block entity for block Block{minecraft:stone} but failed at location BlockPos{x=-289, y=35, z=869}

Maybe someone knows why this could be?

Edited July 13, 2021 by naumoff
after tests

[yaeyewon112]

This is occured when your computer is too slow, try reduce some mods or change your computer

[naumoff]

@yaeyewon112 I know this error is due to poor computer performance. But my server processor is only 35% loaded.

[naumoff]

13 hours ago, diesieben07 said:

Minecraft is mostly single threaded, i.e. it will only use one core.

What could be the reason for this error?

Quote

[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a DUMMY block entity @ BlockPos{x=822, y=29, z=342} but found not block entity block Block{minecraft:stone} at location
[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a block entity for block Block{minecraft:stone} but failed at location BlockPos{x=822, y=29, z=342}
[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a DUMMY block entity @ BlockPos{x=818, y=21, z=347} but found not block entity block Block{minecraft:stone} at location
[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a block entity for block Block{minecraft:stone} but failed at location BlockPos{x=818, y=21, z=347}
[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a DUMMY block entity @ BlockPos{x=811, y=21, z=347} but found not block entity block Block{minecraft:stone} at location
[20:07:28] [Server thread/WARN] [minecraft/Chunk]: Tried to load a block entity for block Block{minecraft:stone} but failed at location BlockPos{x=811, y=21, z=347}