Resolved Not detecting all of RAM

[Wolfgange]

Cervator edit: This was later fixed in the Launcher

When I use the Terasology launcher (latest stable) under options, the maximum and initial ram have a max value of 1GB even though I have 8GB. Under Linux it detects 7 which is about correct, but under Windows 8.1 it only detects 1. Both OS's are 64 bit and in the windows control panel it detects 8GB. Is there any way I can use all of my RAM?

 

[Cervator]

Interesting! You might want to file this as an issue on the Launcher issue tracker and include a screenshot or two

 

[mkalb]

We us this code:

private void populateHeapSize() {
 
long max = 512;
 
final OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
 
if (osBean instanceof com.sun.management.OperatingSystemMXBean) {
 
max = ((com.sun.management.OperatingSystemMXBean) osBean).getTotalPhysicalMemorySize() / 1024 / 1024;
 
}
 
max = Math.max(max, 512);
 
// detect 32 or 64 bit OS
 
final String arch = System.getProperty("os.arch");
 
final boolean bit64 = arch.contains("64");
 
final List<JavaHeapSize> heapSizes = JavaHeapSize.getHeapSizes(max, bit64);
 
for (JavaHeapSize heapSize : heapSizes) {
 
maxHeapSizeBox.addItem(heapSize);
 
initialHeapSizeBox.addItem(heapSize);
 
}
 
updateHeapSizeSelection();
 
}

 

[Wolfgange]

Would it be possible to add an option to manually set parameters in the case that it detects it wrong?

 

[Cervator]

I'm kinda surprised we bother checking for available memory at all? Rather than just pass the memory parameter blindly

Maybe it would be nice to estimate a good starting value based on the system, but leave the selected memory options wide open?

 

[mkalb]

Wolfgange As far as I know you have java skills. Can you write a little test class and analyse the problem with Windows 8.1, please.

 

[Skaldarnar]

Would it be possible to add an option to manually set parameters in the case that it detects it wrong?

How does Java/the OS handle if you assign a value that's higher than your physical RAM? Can there be complication if all of the available RAM is allocated? If that should be the case, I would advice to make this some kind of advanced option.

 

[Wolfgange]

How does Java/the OS handle if you assign a value that's higher than your physical RAM? Can there be complication if all of the available RAM is allocated? If that should be the case, I would advice to make this some kind of advanced option.

When I add the argument when running the Terasology binary from the commandline, "-xms128GB -xmx128GB" (and I only have 8 GB) it gives no extra error, not even in the command prompt. Is this the correct argument I should add when executing Terasology?

And I'm assuming most to all modern OS's should and/or java should correctly handle too much RAM allocation considering I've run Terasology with all of my RAM and max view distance and it only got really laggy.

 

[mkalb]

You need to add "-Xms128g -Xmx128g".

Old java versions didn't run, if you don't have enough RAM. I tested it with Java 7 (Windows 64 Bit, Oracle). It was possible to start the JVM, but it begins to reserve memory (about 5 MB per second).

 

[eldoraman]

You can increase to 4GB on a 32 bit system. If you're on a 64 bit system you can go higher. No need to worry if you've chosen incorrectly, if you ask for 5g on a 32 bit system java will complain about an invalid value and quit.

Eldo