Problem FTB Direwolf 20 1.6.4 Server Lag

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laserball31

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Jul 29, 2019
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Hello, I've been experiencing lag that is out of the ordinary. I've tried to make another world, and deleting suspected mods for CPU time... All without any changes.

I'm current using this as my startup script...

Code: 
java -d64 -server -Xms512m -Xmx12G -XX:PermSize=256m -Djline.terminal=jline.UnsupportedTerminal -XX:ReservedCodeCacheSize=512m -XX:NewRatio=4 -XX:SurvivorRatio=3 -XX:TargetSurvivorRatio=80 -XX:MaxTenuringThreshold=8 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:SoftRefLRUPolicyMSPerMB=0 -XX:MaxGCPauseMillis=20 -XX:GCPauseIntervalMillis=250 -XX:MaxGCMinorPauseMillis=7 -XX:+CMSClassUnloadingEnabled -XX:+ExplicitGCInvokesConcurrentAndUnloadsClasses -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=50 -XX:+BindGCTaskThreadsToCPUs -XX:+TieredCompilation -XX:Tier0ProfilingStartPercentage=0 -XX:Tier3InvocationThreshold=3 -XX:Tier3MinInvocationThreshold=2 -XX:Tier3CompileThreshold=2 -XX:Tier3BackEdgeThreshold=10 -XX:Tier4InvocationThreshold=4 -XX:Tier4MinInvocationThreshold=3 -XX:Tier4CompileThreshold=2 -XX:Tier4BackEdgeThreshold=8 -XX:TieredCompileTaskTimeout=5000 -XX:Tier3DelayOn=50 -XX:Tier3DelayOff=25 -XX:+UseFastEmptyMethods -XX:-DontCompileHugeMethods -XX:+AlwaysCompileLoopMethods -XX:+CICompilerCountPerCPU -XX:+UseStringCache -XX:+UseNUMA -jar minecraft_server.1.6.4.jar nogui

The messages I am getting in console... (Auto-saving not enabled) The server tick is going slow. The last tick was (something around 21000ms, sometimes more). I'm using MCPC+,

Plugins List:

See Attached

Anyone have any ideas? Also tried with MCPC+ removed and a fresh world, and problem persists.
 

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I recommend getting this: http://nallar.me/buildservice/job/T...cessfulBuild/artifact/target/TickProfiler.jar

You may have to go into the config for it and turn the permissions part off (or you could just run the profile command on the console).

Once placed in your mods dir, fire up your server, stop server, change config where required, start server up again.

Wait for the hi CPU event to occur, then do (from the console): profile e

It might take a little longer to do its job during the event, but it will happen, then you just look for the things that are taking an excessively large amount of time to do stuff.

Other option is WarmRoast by sk89q (the worldedit guy), which is a seperate jar that runs independent of the game, assuming you have the MCP mappings for 1.6.4 you can use that to also give you an idea of where the issue might be.
 
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I've already profiled/sampled the jar and nothing seems out of the ordinary. It's not a high CPU event, the server runs fine.... spikes, and kicks everyone off. This needs to be fixed!
 
then you should allocate more ram 12 Gb is not enough to run a dw20 1.6.4 server with many people on it you have 40 Gb you should allocate 32 Gb it will help the lag free


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Dude. Its not the RAM. I can put in as much as 40 GB of ram and nothing will change. It is something wrong with a mod.
 
i know that TE3 have a big problem with the old pipes and they should all be removed or it can corupt the chunks like on another server i played on


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killer313201 said:
then you should allocate more ram 12 Gb is not enough to run a dw20 1.6.4 server with many people on it you have 40 Gb you should allocate 32 Gb it will help the lag free


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Click to expand...
...no no minecraft server needs 32GB of ram in fact that much will slowdown java garbage collection and CAUSE lag.


Also I don't see your server specs, can you post them? Is the server on your home computer?
 
I've been having the same problem random spikes of lag kicking (most) everyone. I was running /chunkloaders at the time and it spiked to around 7000 loaded chunks below is a picture of single player and the modpack not unloading chunks.

http://imgur.com/3sR2uuD
 
/chunk loaders usually causes lag or even crashes the sever. But we will need to know what hardware this server has.
 
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