Java VM ram allocation

[ImBleu]

So..

 

 

My PC can run minecraft decked out at around 90fps (Don't worry, I don't have a GTX980 for Minecraft, I have 200 steam games too). But with both Minecraft and TechnicLauncher It will not let me allocate more than 1GB of ram to the game to run so as you can imagine I crash with Java Virtual Machine out of memory a lot. At this point my macbook pro is more reliable.

 

 

Does anyone have any hints? The highest I've got the game to allow was -Xmx1336m -Xms1336m but anything over -Xmx1536m -Xms1536m and -Xmx2G -Xms2G just won't post.

 

Kind of a bummer tbh. Already tried the Environmental Variables _JAVA_OPTIONS thing.

 

Currently have 8GB of DDR3-1866Mhz ram installed in a dual-channel config (2x4GB).

 

Help?

[ManWithBeard1990]

You know, the problem with those arguments is that this means you're running the launcher with those memory settings; not the game itself. Normally you'll find a memory allocation setting somewhere in the launcher's settings. This will then allow the launcher to launch Minecraft with the desired memory settings.

[FizzyFantom]

Do you have the 64bit version of Java installed? (download "64-bit browser")

https://java.com/en/download/faq/java_win64bit.xml

I found that the 32bit only seems to "see" 3.5GB, of which it only wants to use half. If you already have it installed then poke around in the technic settings file and see if you can edit it there.

Edit: if you have both 32bit and 64bit Java installed make sure that 64bit is the primary Java runtime:

http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/jcp/jcp.html#java

[Tedster]

Wow. I'm surprised that after I quit the Minecraft Forum I'm back to this.

 

Yes, it's because Minecraft's using 32-bit Java. The garbage collector for 32-bit Java can be horrendous (for something demanding of Java like Minecraft especially).

For Minecraft, you don't really need to allocate much more RAM as long as you're using 64-bit as it's so much better at clearing up wasted memory.

[ImBleu]

Wow. I'm surprised that after I quit the Minecraft Forum I'm back to this.

 

Yes, it's because Minecraft's using 32-bit Java. The garbage collector for 32-bit Java can be horrendous (for something demanding of Java like Minecraft especially).

For Minecraft, you don't really need to allocate much more RAM as long as you're using 64-bit as it's so much better at clearing up wasted memory.

 

Well at 1GB allocated it takes no more than 7minutes for it to run out of memory. I kinda think I need to add more.

[ManWithBeard1990]

Well at 1GB allocated it takes no more than 7minutes for it to run out of memory. I kinda think I need to add more.

That'll only help if you do that WITHIN THE LAUNCHER. If you don't it'll just invoke Java through the command line and leave it to its own devices, and that means it'll only take 64 MB (last time I checked)

[Tedster]

Well at 1GB allocated it takes no more than 7minutes for it to run out of memory. I kinda think I need to add more.

Try 64-bit with 1GB.

[Profquast]

you're getting 90fps with a 4790k? That doesn't seem right at all. I think it has indeed something to do with not using 64-bit java.