Help With Minecraft Server

[Rivettz]

Hello all,

I am in the process of making an MC Server. Ive been told that the hardware required isnt steep so I made a server with spare parts I had kicking around.

Server Specs:
-i5 6600k
-16gb DDR4
-AsRock Motherboard
-WD 770 1tb NVMe SSD
-Windows 10

The problem now is, no matter what I do or try my Server will always lag behind. 'server thread/warn can't keep up is the server overloaded' It will be bad like 2k+ ms behind. I invited friends over to see if it would make a difference. Unanimous decision that it was lagging and stuttering. It was originally on an HDD and then I upgraded to an NVMe. Still the same issue. I've seen people say to use Java 8 I am using Java 13. I tried a few things but Idk anything about this so any and all solutions are welcome. If you have any questions Id be happy to answer them! 

[tkitch]

is it modded or running vanilla?

[Rivettz]

1 minute ago, tkitch said:

is it modded or running vanilla?

It is all 100% Vanilla

[Skipple]

What's the system monitor looking like? What's pegging? 

[Haswellx86]

How much memory have you allocated (you can see the memory statistics in the GUI)?

 

Which Java version have you installed? Don't you need like the latest JRE or JDK (JDK 23) to run the latest version of the server?

[Rivettz]

10 minutes ago, Skipple said:

What's the system monitor looking like? What's pegging? 

I haven't Checked. Ill have to run that when I get a moment to see.

[Rivettz]

1 minute ago, Haswellx86 said:

How much memory have you allocated (you can see the memory statistics in the GUI)?

 

Which Java version have you installed? Don't you need like the latest JRE or JDK (JDK 23) to run the latest version of the server?

Im not sure. Ive ran Java 8 and 13. I havent run 23 yet. My server Version is 1.20.2 I have tried both 2gb and 4gb of allocated space. On start up it doesnt lag at all. Then after like 5 seconds the lag starts.

[Haswellx86]

11 minutes ago, Rivettz said:

Ive ran Java 8 and 13. I havent run 23 yet.

Uninstall all Java versions (easy to do from control panel), and install JDK 23 (don't install any JRE).

 

12 minutes ago, Rivettz said:

My server Version is 1.20.2

1.21 is out. Why not upgrade?

 

13 minutes ago, Rivettz said:

I have tried both 2gb and 4gb of allocated space.

4 GB should do fine. I mean you have 16 gigs, so why not allocate 6 or even 8? But yeah, 4 should be enough, but more doesn't hurt.

 

14 minutes ago, Rivettz said:

On start up it doesnt lag at all. Then after like 5 seconds the lag starts.

That sounds weird. If it were a Java version issue, then this probably shouldn't be a symptom. Inspect task manager and see for weird activity. Monitor CPU clock speeds and temperature. Restart Windows if haven't already.

 

_{Or even better, why not run the server on Linux instead of Windows?}

[OddOod]

30 minutes ago, Haswellx86 said:

_{Or even better, why not run the server on Linux instead of Windows?}

Haswell has, well, a point

How many people are using the server? If you've got a ton, it may be overloading. 
Definitely crank the allocated memory up, that will help. 
Also, check your temps. If it's old hardware, it's possible the paste job is dried out. 
Any Errors being thrown in Event Viewer? Or in the MC logs?

[Rivettz]

3 minutes ago, OddOod said:

Haswell has, well, a point

How many people are using the server? If you've got a ton, it may be overloading. 
Definitely crank the allocated memory up, that will help. 
Also, check your temps. If it's old hardware, it's possible the paste job is dried out. 
Any Errors being thrown in Event Viewer? Or in the MC logs?

I will have around 15 people on the server at the maximum. Im gonna try to run Java 23 and see if that does what we need it to do. I will have some updates here soon!

[OddOod]

Just now, Rivettz said:

will have around 15 people

But how many are on when the warning is thrown?

[Rivettz]

3 minutes ago, OddOod said:

But how many are on when the warning is thrown?

1. Myself. Sometimes even before when its loading.

[OddOod]

I'm also seeing some reports that it could be bad networking. Can you speed test from the server? 
Also, check task manager > (more details)> performance > cpu > right click graph > change graph to > logical processors
Maybe there is a heavily loaded core

 

2 minutes ago, Rivettz said:

1. Myself. Sometimes even before when its loading.

Good to know, and I assume that if you sit there for a while it doesn't just go away?

[Rivettz]

3 minutes ago, OddOod said:

I'm also seeing some reports that it could be bad networking. Can you speed test from the server? 
Also, check task manager > (more details)> performance > cpu > right click graph > change graph to > logical processors
Maybe there is a heavily loaded core

 

Good to know, and I assume that if you sit there for a while it doesn't just go away?

Yes it doesnt stop or go away when I am just standing there. I also Speed Tested on Ookla on the server Im getting 550+ Mb/s Down and like 22Mb/s Up. That should be plenty I would presume. 

[Haswellx86]

2 minutes ago, Rivettz said:

Yes it doesnt stop or go away when I am just standing there. I also Speed Tested on Ookla on the server Im getting 550+ Mb/s Down and like 22Mb/s Up. That should be plenty I would presume. 

What if your client PC is directly connected to the server over ethernet? Then try if the problem occurs again, but first, try all the stuff that I mentioned earlier.

[Rivettz]

1 minute ago, Haswellx86 said:

What if your client PC is directly connected to the server over ethernet? Then try if the problem occurs again, but first, try all the stuff that I mentioned earlier.

Just so its noted. My set up goes from Coax -> to Modem -> to Router -> to 48 Port Switch -> to Server, Client PCs, and Wifi. The main machine is over the wire. While all the other machines are over the Wifi. Also I am using Radmin VPN to allow connections.

[Haswellx86]

32 minutes ago, Rivettz said:

Also I am using Radmin VPN to allow connections.

VPN for LAN? What?

 

I just said out of curiosity to directly connect the client PC to the server over ethernet. Nothing in between. If that is even possible of course.

[Rivettz]

1 hour ago, Haswellx86 said:

VPN for LAN? What?

 

I just said out of curiosity to directly connect the client PC to the server over ethernet. Nothing in between. If that is even possible of course.

Local direct Connection is not possible. The VPN is for LAN and for WAN Players to join.

[Skipple]

2 hours ago, Rivettz said:

Also I am using Radmin VPN to allow connections.

This could absolutely be causing your issues, but also fairly easy to isolate. Requiring all traffic is required to flow through a third party is going to cause added latency, it's just a matter of how much and how well that traffic is prioritized. 

 

Just now, Rivettz said:

Local direct Connection is not possible.

Why not? You can certainly test this for yourself by typing the local IP/Port of the server on your client. 

[Rivettz]

This is getting complex.. I was hoping to just use a VPN so I can invite peeps through it. Goodness.. What should I do instead? Would I have to use the IP of the Server along with the port instead of the VPN? I've never been successful in making that happen. Call me what you will but I don't know how to most of this. Hence why Im here lol. 

[Skipple]

20 minutes ago, Rivettz said:

This is getting complex.. I was hoping to just use a VPN so I can invite peeps through it. Goodness.. What should I do instead? Would I have to use the IP of the Server along with the port instead of the VPN? I've never been successful in making that happen. Call me what you will but I don't know how to most of this. Hence why Im here lol. 

Before you start taking action, I would isolate the issue. Connect locally to the server using its local IP and see if that eliminates the issue. If it does, then you know it's more than likely the VPN.

[Haswellx86]

1 hour ago, Rivettz said:

The VPN is for LAN and for WAN Players to join.

No, just disable the VPN.

[Rivettz]

1 minute ago, Haswellx86 said:

No, just disable the VPN.

Then where will I find the IP address to use for the Server? Is it under the Server Settings? 

[Skipple]

48 minutes ago, Rivettz said:

Then where will I find the IP address to use for the Server? Is it under the Server Settings? 

The IP address is just your public IP.

[Rivettz]

Okay so I disabled the VPN and setup the server with the IP. I am able to connect to it no problems. But the Lag and stuttering are still happening. I tried updating Windows and Rebooting. I also reinstalled the LAN Drivers for my motherboard, along with changing the speed to 1G Full Duplex on the Network Port. The Task Manager says that I am well within spec for CPU Usage it doesnt go about 12%. The Network seems to be good too. I dont see any hiccups or spikes that are out of the ordinary. I am able to connect to the server but the Lag is still present. Any other Ideas that I can potentially try? Or data that you request?