[TUTORIAL] Reducing lag and (possibly) fixing corrupt worlds

Ok anyone having problems upgrading to java 1.7, but still get the java 1.6 with java -version, do this:

remove java 1.6 (either 'yum remove java' or 'apt-get remove java')
'which java' //should output /usr/bin/java : no directory or something
'cd /usr/bin'
'ln -s /<path-to-java-1.7-directory>/bin/java java'

so mine would be 'ln -s /opt/jdk1.7.0/bin/java java'

If you get a message to replace it, say yes.
Now type

'java -version' and should be working now!

howdy there

im running bukkit on ubuntu, and i couldnt figure out how to install sun java , so ive installed openJDK, is is the same thing ?

server performance has been improved with your tips, however i started gettin a few "too many open files" socket exception
any ideas ? thanx for any help !

you can increase your file limits in limits.conf (in RH distro /etc/sysconfig/limits.conf)

If you can't install Java 1.7 from oracle, you can just use Java 1.6 from oracle by running apt-get install sun-java6. However you must have the official ubuntu proprietary repo which includes things like video card drivers but also oracle java.

i tried using java 1.7 but it says on my server Error: cannot find or load main class java..
I'm using a Windows 7 OS, Quad Core, 4gb RAM..

This thread saved my server. After launching with the options, my RAM usage went WAY down and the server is a lot less laggy and so far is not crashing.

Recently i have been having lag issues on my server even when its just me on. i would also appreciate if somone could give me an estimate on how many people i could fit on my server with limited lag. i run the server on my own computer along side minecraft.
Win7 64
AMD dual core
4gb of ram
Bukkit 953
Plugins- Essentials, MobArena, WorldEdit/Worldguard, Permissions, Multiverse
might get rid of essentials for other plugins

i just tested out the server without essentials and it does seem to be doing much better could i get a suggestion for replacement plugins

Well first of all get rid of Windows and second swap Essentials for Commandbook. Read my orignal post.

Server runs much better now thanks. Cant get rid of windows though but would love to have a dedicated server running ubuntu. Any suggestions on how many people i could host without lag.

this looks like a good resopurce can we get this expanded a bit then put in the list of unhsticky sticky-ables

so i can learn something from this server start command can someone break down what each command does? i am switching from the one in my signiture to the one you gave I was just wondering what the difference was besides garbage collection...... and maybe an explination of how that relates to the server..... please

I'm in vacation, when I get home I will rewrite the launch line and explain everything on the way.

AWESOME!

Hi... My world is corrupt and I have no idea how to follow those instructions that you wrote, I do know a lot about extracting things to folders et / how to crack games but this is just too much.. wonder if you could help me fix it and and send it to me, if any of you guys would be so kind to do so I will be extremly happy!
/D

http://www.mediafire.com/?4hqe9ua3uhp3gjr

Okay this worked! I think haha, but now i reinstalled all my permissions and kept the files from the server but permissions and essentials won't work. Help please.

More information please :3

Okay I used chunkster to fix my main world and some others (multiverse). And well now that its all back I loaded everything and my plugins arn't working! D:. For permissions, it will say I'm admin but won't have the motd colors even though all the coding is there for them, and essentials isn't even working. D":

That isn't Chunkster's fault. Are you sure your worlds are named correctly?

I just love it. Reduced the ram usage by 1.2 Gb!!!! Removed essentials, installed commandbook, used /butcher and the special run command.
/me crys in joy.

Edit: Can a moderator sticky this post please? Might help MANY players. My server takes less ram and cpu than my game -.-

I still have plans to tweak that even more :3

You. Are. Awesome.

Nice thread. Thanks.

Thanks!

does command book make that much difference over essentials?

I use essentials for home warps protection of chest and rails motd rules (think thats it)

Yes, Essentials is a huge buggy and slow package.

if you don't mind me asking, how so? what bits do you find slow? I've not really been able to fault it but maybe am just not seeing what the alternatives are like

I've seen many people complain about their servers lagging in the help section before. I told them to remove essentials and replace it with CommandBook and they said the lag is gone...

Hello, I am trying to use the 32bit (x86 - it's not meant to be an anagram for my name XD) with these boot up commands:

Code:

-XX:ParallelGCThreads=8 -Xincgc -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+AggressiveOpts -XX:+CMSParallelRemarkEnabled -XX:+DisableExplicitGC -XX:MaxGCPauseMillis=500 -XX:SurvivorRatio=16 -XX:TargetSurvivorRatio=90 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -Xnoclassgc -XX:UseSSE=3 -XX:PermSize=128m -XX:LargePageSizeInBytes=4m 

I tried to add these to Remote Toolkit by removing the "-" by replacing them with ",". So it will look like this:

Code:

extra-runtime-arguments=-Djline.terminal\=jline.UnsupportedTerminal, -XX:ParallelGCThreads=8,  rest of the start up arguments ...

When I try to start it up I get this error:

Code:

Error: Could not find or load main class ParallelGCThreads=8

Okay i read this 100 times and dont get it!
EDIT! i am from swe thats because i dont get it.

Code:

java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

where should I paste it?

reg

Thx for this great thread, helped alot!