Increase heap size in java for weka

Question

I\'m trying to increase the heap size in java for weka which keeps crashing. I used the suggested line:

> java -Xmx500m -classpath

but

Answer 1

I am running Weka 3.6 in windows. This is what i did. Go to the Weka installation directory and you will find a RunWeka.bat file. Open this file in a text editor and add -Xmx argument in the java command line.

for instance this sets to 4GB memory, %_java% -Xmx4096m -classpath . RunWeka -i .\RunWeka.ini -w .\weka.jar -c %_cmd% "%2"

Answer 2

Omit the -classpath option. Use just -Xmx500m option.

So, instead of just:

java weka.core.Instances data/soybean.arff

you do:

java -Xmx500m weka.core.Instances data/soybean.arff

If you run weka via some script (RunWeka.bat for example), then you need to modify that script (with some text editor like notepad).

Answer 3

Run this command in your terminal:

java -Xmx1024m -jar weka.jar

Answer 4

The official Weka answer (for all operating systems and Weka versions) can be found on http://weka.wikispaces.com/OutOfMemoryException.

In case you are using a recent Weka version on Windows, the answer is:

Modify the maxheap parameter in the RunWeka.ini file.

Answer 5

The best way to do it using this command

    java -Xmx1024m -[weka classifier] -t [training file path]

Answer 6

You should also see if default thread stack size 20MB is enough. Increase the value to 50MB in the file /Applications/weka-3-8-1-oracle-jvm.app/Contents/Info.plist (on MAC) like below:

<string>-Xss50M</string>