If your queries are specific to the jvm settings then you can get the details about the use of those java_options in the following link:
However those are tuning parameters and the value for those jvm options varies based on the various factors.
can you please also share URL for Jboss application server
If you want to download JBoss EAP (Red Hat Supported) then you can get it from: https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=appplatform&downloadType=distributions
If you want to download the GA version for trial / testing purpose then its GA (and Alpha/Beta..) versions are also available at: JBoss EAP - Downloads
JBossAS7 (Community) can be downloaded from: http://jbossas.jboss.org/downloads
WildFly is the latest if you want to try: Downloads · WildFly