TonyCubed
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@Talven81
A Core 2 Duo/i3 would smash the pants off an Atom, even a Celeron based CPU has a good chance depending on which version you get.
Its for absolutely nothing to do with the NIC, mojangs implementation of netty is. Spigot has had netty since January, mojang added Betty late into the 1.7 dev cycle.
Just an update.
I tried Spigot 1.7.2 and I didn't have any CPU/lag issues, I went back to normal Vanilla because there are bugs with Spigot/Bukkit, but as soon as they are fixed I'll be returning to Spigot.
With the last comment I made about Netty and Spigots experience with Netty I'm pretty certain that Netty is to blame for the issues I'm having and quite possibly yours as well.
Hey everyone, I've been using Jvisualvm to try and see what's going on, the best I've been able to do and understand is this image: http://s29.postimg.org/dv3o0dbaf/Screenshot_from_2013_12_01_18_13_42.png
So it's quite possibly Netty is responsible for our issues.
Using the latest java update already. I've also denied read/write access to minecraft.dat so the server cannot create another and the problem persists.
Also, I've moved to a completely new host from a Core i5 2500 to a Core i7 4770, same issue.
@Jim
You have a 32bit dual core Atom, I think that's your issue. :/
@Galaxy
Agreed
@Jim
Can you provide a debug log please as it might be useful to the developers.
@Joshua
Yes, deleted all the *.dat files, didn't work for me.
@Flex
We don't have a GUI because I'm running from command line, still the same issue.
Galaxy, I've been posting in that specific thread you've linked, and yes, it's a fresh 2 week map. 😛
I sent a message on reddit to jeb about this issue, pointed him to this bug report, no idea if he'll ever pick it up.
@Galaxy
Yeah, I've tried running on my home server, still issues when me and my 2 brothers play. But avoid this topic as it's already been closed.
Been 35 minutes since my last server restart and there is only 2 people online, keep getting this in the console without debug enabled:
13.11 10:34:47 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2865ms behind, skipping 57 tick(s)
13.11 10:34:01 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2864ms behind, skipping 57 tick(s)
13.11 10:33:15 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2772ms behind, skipping 55 tick(s)
13.11 10:32:29 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2783ms behind, skipping 55 tick(s)
13.11 10:31:43 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2744ms behind, skipping 54 tick(s)
13.11 10:30:58 [Server] Server thread/WARN Can't keep up! Did the system time change, or is the server overloaded? Running 2718ms behind, skipping 54 tick(s)
Just to clarify, deleting the *.dat files from the world 'data' directory didn't help.
Dinnerbone did say that this issue wasn't 100% fixed, just letting you all know that.
Posting for another user from reddit, here is his post: http://www.reddit.com/r/admincraft/comments/1q2x5j/help_looking_for_technical_help_with_my_server/
Console snippet: http://pastebin.com/nvbmrDcF
Debug profile: http://pastebin.com/dSvXyEJQ
Specs: AMD Opteron 6272 Interlagos 2.1GHz Socket G34 115W 16-Core Server Processor (2 of these bad boys installed) (this is the host box, the VM that MC runs on has 4 of these cores dedicated to it)
Thanx for letting me know about this bug report Sage905, let's get to work!
Here is a snippet of my console output during a debug: http://pastebin.com/FT9pUAPy
There isn't a single issue that it's reporting, it's waiting on connections, newAI, entites, ticks etc
Here is the bug report of about 10+ minutes after a fresh server restart: http://pastebin.com/M91mYZjE
TPS is currently at 16 but it's starting to dip more.
Tried different memory allocations from 2GB to 10GB, the server is dedicated with a i5 2500, 16GB RAM. 2x2TB RAID-0, 200Mbit connection up and down.
Ubuntu 13.04
Oracle Java 7 (most recent update and also tried OpenJDK)
Multicraft game panel
I haven't deleted the map dat files as others are suggesting, are there any issues with doing this?
@Pat
Hey there,
Having the exact same issue, it's definitely a cumulative issue because CPU usage is normal (between 10-25%) but starts to increase over an hour to the point there is major block lag. TPS goes from 20 at the beginning of a server restart to about 7-8 near the end of the hour so it's definitely a build up some where.
It's similar to a memory leak issue where the process will grow and grow until it gets out of control.
I'm running a dedicated server with this server instance only running (had to shut down other servers to free up resources and eliminate the possibility of just running too many servers).
I'm running a complete Vanilla setup and allocated 2GB, 4GB, 6GB, 8GB and 10GB (current) to see if these allocations were effecting the issue but they are not.
I've also ran the Java GC in debug mode to report how fast it's cleaning the memory and it's running as it should be.
At first I thought it could be an entity issue on the map where something was loading a ton of entities (like 200+) but I've used region fixer and scan for entities greater than 50 in chunks and found nothing.
The closest I've been able to figure out about the lag issue is that I don't believe it was there in the early 1.7 snapshots since I run a snapshot server as well, and if that's the case the only major things they've added since adding the new biomes is the netty codebase which was added late into the snapshot cycle.
Go find me a person with decent knowledge of computers and servers and get them to tell me I'm completely wrong and your right, please.
No, the reason people don't share things is because 99% of the bullshit on here is filed by idiots who don't know anything.
I can confirm that this happens to me, here are some crash logs on a server I run:
http://paste.debian.net/129339/
http://paste.debian.net/129341/
http://paste.debian.net/129342/
http://paste.debian.net/129343/
My server has crashed 10 times over the paste month with the exact same error but I noticed that the lines of code it says are the issue are slightly different sometimes (as in a line difference in the code).
This error has existed in 1.8, 1.8.1 pre1, 2 and 3.
Also, Sonic, I run a completely Vanilla server with no mods or anything and the crash report also says it cannot tell if it's modded or not, so a bug maybe?