how to allocate more ram to minecraft server on laptop

[Snowarch]

I can run the server no issue on my 16gb main rig, but i need that to play the mods. my laptop gets maybe 45 fps with no shader minecraft. sadly i did not know about the server running pc cannot connect to the game without server breaking.

 

on my laptop i get an error about the heap being larger than expected or something similar when trying to run this command in my terminal

 

java -Xmx6144 -Xms6144M -jar minecraft_server.1.12.2.

 

when i run minecraft java with optifine it gives about 6.5ram gigs to the game so i can see with the f3 key in game, so i know the server sould be able to take 6. how do i fix it? also the laptop in question has 8gigabytes of ram total and is running ubuntu. and is 6gigqbytes enough ram to hoat the server comfortably with shaders and mods? for maybe 2-5 people with myself included?

[TwilightRavens]

Depends on how many mods, also you may get that error because its defaulting to the 32 bit java executable, try just installing the 64 bit one and see if that changes anything 

[Its_MrMa]

8 minutes ago, Snowarch said:

java -Xmx6144 -Xms6144M -jar minecraft_server.1.12.2.

you should edit the numbers here, for example if you want 8gb "java -Xmx8192 -Xms8192M -jar minecraft_server.1.12.2".

 

this works of normal minecraft i'm not sure if it works on server version

[Snowarch]

well, rlcraft is what i was planning for first mod. that will only have me and my friend.  

 

and why does minecraft the game work fine if the server xoesn't? wouldbnt the game goto 32 bit as well if it is that? @TwilightRavens

[Snowarch]

@Its_MrMa

 

wish i could give all 8. gui uses one ram gig i think ot to mention swap using some other. so 6 seams safe. i hope.

[Eigenvektor]

5 minutes ago, Snowarch said:

and why does minecraft the game work fine if the server xoesn't? wouldbnt the game goto 32 bit as well if it is that? @TwilightRavens

If your Java runtime is 32 bit, it means it can't allocate more than ~3.5 GB of RAM, which is most likely why you see that error. Enter "java -version" on the command line and see what kind of output you get. To reserve 6 GB of memory you need the 64 bit Java runtime.

 

java -Xmx6144 -Xms6144M -jar minecraft_server.1.12.2

This tells Java to reserve 6 GB of RAM initially and that it can use up to 6 GB of RAM. Java tells you "Sorry, can't do that" (because 32 bit). This has nothing to do with Minecraft at this point, the program hasn't even started yet.

[TwilightRavens]

16 minutes ago, Snowarch said:

well, rlcraft is what i was planning for first mod. that will only have me and my friend.  

 

and why does minecraft the game work fine if the server xoesn't? wouldbnt the game goto 32 bit as well if it is that? @TwilightRavens

I’m honestly not sure, on mine on windows at least, I tell the minecraft client to override the version it comes with and instead point it to the directory i have java64 installed. I’m sure there’s a similar switch for the server in the config file to tell it to default to “whatever file path you have java installed in”

 

like said above if it is defaulting to the 32 bit version (which minecraft likes to do) it will only address 3.5GB of RAM (4GB if its PAE aware) in which case you are telling it to use more RAM than it can. Easiest way would be to uninstall all jave versions from your PC, and then reinstall only the 64 bit version.

[Snowarch]

this is in game. with bsl shaders

 

but when i close the game and try that server command i get this.

 

 

[Eigenvektor]

6 minutes ago, Snowarch said:

You have a typo in your command line

 

-Xmx6144 - This tells java it can use a maximum of 6144 byte of memory

-Xms6144M - This tells java to reserve an initial amount of 6144 Megabyte of memory

 

That is a contradiction In other words you need to add the "M" at the end of Xmx as well.

[Snowarch]

o okay i coppied the command i used to start the server from my desktop, and must of removed that by mistake. thanks. server starts correctly now.

 

@Eigenvektor

[Snowarch]

now that i have the server running one question. can a pc on the same wifi network as the server still join or does it break the server?

[TwilightRavens]

7 hours ago, Snowarch said:

now that i have the server running one question. can a pc on the same wifi network as the server still join or does it break the server?

Should be able to join without issue.

[Snowarch]

when i add mods, the server doesn't see them. added server rl craft modpack.

[Craftyawesome]

7 hours ago, Snowarch said:

when i add mods, the server doesn't see them. added server rl craft modpack.

Make sure you are launching forge and not vanilla.

[Snowarch]

everytime it launches vanilla. i even deleted the whole world data but left the mod folder in a folder titled "world" how do i make it launch right? and yes i checked optifine forge is in the mods folder too. @Craftyawesome

[Craftyawesome]

1 hour ago, Snowarch said:

everytime it launches vanilla. i even deleted the whole world data but left the mod folder in a folder titled "world" how do i make it launch right? and yes i checked optifine forge is in the mods folder too. @Craftyawesome

Your directory should look like this

 

Your launch command should be

java -Xms10G -Xmx10G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=8 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=”https://mcflags.emc.gs” -Daikars.new.flags=true -jar forge-1.15.2-31.1.18.jar nogui

(change ram values and the name of the jar in the launch command to match yours)

[Snowarch]

mine looks like this to launch. the picture is the server world file. was taken with server running. i do not plan to have a 24hour server or anything like that. as you can see mods are there, but nor loaded into the server/world at all. just ignored. @Craftyawesome

java -Xmx6144M -Xms6144M -jar minecraft_server.1.12.2.jar

 

[Craftyawesome]

1 minute ago, Snowarch said:

mine looks like this to launch. the picture is the server world file. was taken with server running. i do not plan to have a 24hour server or anything like that. as you can see mods are there, but nor loaded into the server/world at all. just ignored. @Craftyawesome

java -Xmx6144M -Xms6144M -jar minecraft_server.1.12.2.jar

 

My screenshot was taken in the root directory, and that is where the mods directory should be. Also minecraft_server.1.12.2.jar is probably vanilla, have you installed forge? http://files.minecraftforge.net/maven/net/minecraftforge/forge/index_1.12.2.html

[Snowarch]

id assume so. my minecraft client runs mods no issue. also in the mods folder in the screen shot there is a mod called "forgeoptifine.jar" @Craftyawesome

[Craftyawesome]

3 minutes ago, Snowarch said:

id assume so. my minecraft client runs mods no issue. also in the mods folder in the screen shot there is a mod called "forge optifine."

You need to install the server separately.

 

And again, you will need to move the mods folder to the root directory

[Snowarch]

what do you even mean? matter where you put the server file, itll dump everything in home, so since

 

.minecraft/mods, ~/world/mods, and .minecraft/versions/rlcraftbeta1.12.2

 

are the only places mods can be put, theyre all there. also what makes no sense is i can add shaders to the server despite it being vanilla.

 

and when you say "install forge properly" thats confusing too. some time back, i got my server to load rlcraft but it was still concidered vanilla(the V-logo on server list). i had to reinstall the os since then, so i lost this server now it will no longer work. same .jar file as last time too.

 

@Craftyawesome

[Craftyawesome]

11 minutes ago, Snowarch said:

what do you even mean? matter where you put the server file, itll dump everything in home, so since

 

.minecraft/mods, ~/world/mods, and .minecraft/versions/rlcraftbeta1.12.2

 

are the only places mods can be put, theyre all there. also what makes no sense is i can add shaders to the server despite it being vanilla.

 

and when you say "install forge properly" thats confusing too. some time back, i got my server to load rlcraft but it was still concidered vanilla(the V-logo on server list). i had to reinstall the os since then, so i lost this server now it will no longer work. same .jar file as last time too.

 

@Craftyawesome

I'm not aware of forge server looking for any mods outside of the mods folder in the same directory as the jar. Vanilla logo sounds more like a bug than running forge mods on vanilla.

[Snowarch]

so i should move the server jar into the world folder?

Spoiler

 

 

[Craftyawesome]

1 minute ago, Snowarch said:

so i should move the server jar into the world folder?

  Hide contents

 

 

Move the mods folder to home and install forge.

[Snowarch]

alright ill try that.