Ubuntu Installation :: Java: Increase GC Overhead Limit?

I've run a script which I need to parse a lot of data through to a webapp.

I got this error with my ruby script, running through jruby, firing into an apache webapp:

Java/util/Array.java:#### java.lang.OutOfMemoryError: GC overhead limit exceeded (NativeException)

(Where #### was the line number)

I've looked at:

[URL]

I think it suggests I do:

Code:
-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode
-XX:+PrintGCDetails -XX:+PrintGCTimeStamps
-XX:+CMSIncrementalPacing -XX:CMSIncrementalDutyCycleMin=0
-XX:CMSIncrementalDutyCycle=10
My java version:

Code:

java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)

Q1: How do I implement that into the java/util/Arrays.java file?

Q2: Is there a way of temporary making the Java VM/JDK have better handled GC overhead?