TPS drops despite low CPU usage

[misikokos1]

I made 3 modpacks on my server. Despite lowering mod quantity and giving more ram TPS behave the same. Everytime if there is more than 2 players tps drops to 10-15. Here is my recent mods. I think it's a entity problem and untamed wilds or alexmobs are causing it.


https://docs.google.com/spreadsheets/d/19PLKwRUSVtldyvzims1vjMKj9wUyp6ZdxwZDly5FaW4/edit#gid=0

[misikokos1]

7 hours ago, diesieben07 said:

Use https://www.curseforge.com/minecraft/mc-mods/spark to create a profile.

https://spark.lucko.me/d1qhAsc52H

here are results

 

[warjort]

Click on your link.

See where it says "all" - click on it and it will change to "flat".

Now click the arrow next to "Server Thread 100%" at the bottom.

You will get something like the following:

Quote

Server thread100.00%

net.minecraft.server.MinecraftServer.func_240802_v_()99.86%

net.minecraft.server.MinecraftServer.func_240783_a_()99.86%

net.minecraft.server.MinecraftServer$$Lambda$10803.658110002.run()99.86%

java.lang.Thread.run()99.86%

net.minecraft.server.MinecraftServer.tick()98.23%

net.minecraft.server.MinecraftServer.updateTimeLightAndEntities()98.13%

net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities()98.13%

net.minecraft.world.server.ServerWorld.tick()92.00%

net.minecraft.entity.LivingEntity.tick()83.77%

This says your server thread is spending ~84% of its time ticking entities.

 

Now click where it says "flat" and it should change to "sources".

You should see something like the following:

Quote

alexsmobs (28881.13ms)

Server thread20.29%

dungeons_mobs (19509.26ms)

Server thread13.71%

projectvibrantjourneys (11128.12ms)

Server thread7.82%

untamedwilds (6517.9ms)

Server thread4.58%

survive (5553.77ms)

Server thread3.90%

rats (3953.77ms)

Server thread2.78%

So at least 34% is in alexmobs and dungeonmobs.

It will be more than this, since it is only counting where it is actually inside their code.

It does not include time spent by Minecraft handling the entity before it calls their code.

 

Things you can do include:

* Look at the mods documentation and talk to the mod author about optimisation these mods, e.g. changing mob caps to spawn less mobs

* Change the "simulation-distance" in server.properties so that the server can stop ticking mobs when they are closer to the player, the default is 10 chunks

 

Edited August 10, 2022 by warjort