Dedicated blade server, still not fast enough?

[Yavimaya401]

Title Dedicated blade server, still not fast enough?

Launcher Type Server

Modpack FTB Beyond

Modpack version FTBBeyondServer_1.11.0

Have you modified the pack? Yes

Link to log file http://paste.feed-the-beast.com/view/568b24c8

Details of the issue so i have a dedicated dual quad xeon blade server with 16 gigs of ram and 8 10k sas drives running ftb beyond, and i still get errors every min or so. (Can't keep up!) using resource monitor on the windows server i can see its not using much of anything along the lines of disk use. only around 8% of cpu use and about 3 gigs of ram. its a fresh install of the server with our world copied too it. and ive cleared out all the claimed chunks so none are loaded.. what am i missing?

 

[Yavimaya401]

i forgot to mention that we added 2 mods. FastLeafDecay-v11, and teleporters-1.1.3.

 

[grandrolf]

Some questions:

What cpu-modell (doesn't matter that it's dual, Minecraft is singel-thread anyways)?

How much ram is dedicated to the Minecraft server (is 16 the max on the server?)?

Drives connected on fiber channel? (what setup and have you checked the IO?)

Fresh install - are the messages comming when loading new chunks or all the time?

What version of windows are you running?

Do you have any antivirus software on the machine (not counting the built in) - or other security software?

Can you also get the /logs/fml-server-latest.log and share that?

 

[Yavimaya401]

x5355
6gb for minecraft because i read somewhere that java doesnt behave very well with more. i aslo had the errors when i let it use 14gb.
drives connected to onboard perc 6/i raid controller.
yes fresh redownload of the server with our world coppied and the errors happen all the time, regardless of use. could be standing still in a corner.
windows server 2012 r2
no antivirus, essentially a clean install of windows
i did post the log but ill post the newest one

 

[Yavimaya401]

http://paste.feed-the-beast.com/view/7c3afc88

 

[lenscas]

(doesn't matter that it's dual, Minecraft is singel-thread anyways)?

Every dimension runs in its own thread nowadays and I believe the garbage collection can also run on its own thread.

About the log in the first post: I expected a lot more lines while booting the server. Minecraft mods really like to dump everything to the console (maybe you aren't starting it properly?)
Another thing to be aware off (assuming your windows server has a gui) DO NOT allow the minecraft server to use its GUI. It causes a lot of lag and adds nothing of value.

 

[Yavimaya401]

i have it set to no gui. and there is a lot of bs in the console on boot. it just doesn't appear in the log.

heres the startup line from start.bat

:startserver
echo Starting server
java -server -Xms1012M -Xmx6144M -XX:MaxPermSize=512M -XX:+UseConcMarkSweepGC -jar %FORGEJAR% nogui"

i am by no means a java guy so there could very well be something wrong that im doing.

 

[Yavimaya401]

would setting java as a priority in task manager help, or would that make it more unstable?

 

[Henry Link]

In 1.7.10 I'm pretty sure all of the worlds are still single threaded. Can you run the top command then press the 1 key while in top. It will show you the individual CPU activity. Are you pegging out a single core? The xeon x5355 is only 2.6 GHz which is pretty low for a single core.

 

[lenscas]

In 1.7.10 I'm pretty sure all of the worlds are still single threaded. Can you run the top command then press the 1 key while in top. It will show you the individual CPU activity. Are you pegging out a single core? The xeon x5355 is only 2.6 GHz which is pretty low for a single core.

he is on windows, so I don't think top is a thing.
He also mentions that he has only around 8% of cpu use. Though I do agree that 2.6 GHZ is low for modded minecraft.

 

[jikuja]

Every dimension runs in its own thread nowadays

Source or other proof?

 

[jikuja]

The xeon x5355 is only 2.6 GHz which is pretty low for a single core.

+1 According to passmark's list its single core performance is worse than my previous laptop from 2011.

 

[lenscas]

Source or other proof?

from the wiki

Each dimension (Overworld, Nether, End) run on separate threads.

• This makes it so that the performance in one dimension, is independent of the performance in all others

https://minecraft.gamepedia.com/1.8
I am pretty sure I also saw it somewhere else but can't find it anymore. Also, if that still doesn't have to mean that having multiple cores may help then please tell me (and ideally explain).[/QUOTE]

 

[jikuja]

from the wiki

https://minecraft.gamepedia.com/1.8
I am pretty sure I also saw it somewhere else but can't find it anymore. Also, if that still doesn't have to mean that having multiple cores may help then please tell me (and ideally explain).

[/QUOTE]
Sadly that wiki article does not state its source and it just is not true. That feature was enabled once for one(?) weekly build and then it was removed. Someone added that into wiki as major new feature even it is not listed in any official changelogs.

Refs: https://twitter.com/Dinnerbone/status/469086453268770816 => https://twitter.com/dinnerbone/status/469427387990827010

After that I have never seen references to multithreaded dimensions except minecraft.gamepedia pastes. Also if you run any tool to check threads of Java process you won't find separated processes for dimensions. TBH last time I checked threads was 1.9-ish.

 

[lenscas]

Sadly that wiki article does not state its source and it just is not true. That feature was enabled once for one(?) weekly build and then it was removed. Someone added that into wiki as major new feature even it is not listed in any official changelogs.

Refs: https://twitter.com/Dinnerbone/status/469086453268770816 => https://twitter.com/dinnerbone/status/469427387990827010

After that I have never seen references to multithreaded dimensions except minecraft.gamepedia pastes. Also if you run any tool to check threads of Java process you won't find separated processes for dimensions. TBH last time I checked threads was 1.9-ish.

Thats a shame. I guess the first time I heard about it was in a snapshot video of some youtuber and just missed that it got removed

 

[grandrolf]

x5355
6gb for minecraft because i read somewhere that java doesnt behave very well with more. i aslo had the errors when i let it use 14gb.
drives connected to onboard perc 6/i raid controller.
yes fresh redownload of the server with our world coppied and the errors happen all the time, regardless of use. could be standing still in a corner.
windows server 2012 r2
no antivirus, essentially a clean install of windows
i did post the log but ill post the newest one

like said above, the CPU is on the low end for running a minecraft server

Memory for servers can be set higher than for the client, I'm guessing you've read recommendations to client issues.

About the drives - have you checked the performance of the drives? (are you setting it up as raid or using storage spaces from windows?)

Then depending on how you've set up time sync on that machine (if it's in a domain and there are group policy that force a time sync to occur very often), you could have issues.
Minecraft is sensitive to if time is changed - and that could cause the skipping of ticks - but this is perhaps not your issue, most likely it's the CPU (and perhaps read/write issues on drives - just suggesting, not saying it is)

EDIT: about the log, you probably to the /logs/latest.log - but you should get the fml-server-latest.log

 

[Yavimaya401]

so if i open up resource monitor java appears to be using 70-75 threads with an average cpu usage of 7.75% i will post a screen shot of that and the correct log in the next post (which may take tome to be "approved")

 

[Yavimaya401]

http://paste.feed-the-beast.com/view/6e0f49e1

https://imgur.com/a/tHPTG

 

[Henry Link]

Ok but what are the individual CPUs doing? Are you maxing out one of them?

 

[Yavimaya401]

the highest load on any one core is about 40%