To answer your question " "
The answer is no. CA did not create jboss and therefore will never release any "Official" documentation on performance tuning a 3rd party product.
That does not leave you without information though.
Log into the support center (support.ca.com) and hover over Knowledge center, then click on documentation
Type the name and version in the Select a Bookshelf drop down
Click on › Optimizing CA Identity Manager › CA Identity Manager Performance
You should also try searching the communities discussions for performance related topics:
Here are three that I found typing "performance" into the search bar in the upper right of this screen:
https://communities.ca.com/message/98353074#98353074
https://communities.ca.com/message/106002627#106002627
You should download and read the attached PDF
Number of servers for optimal performance
As for things specific to jboss, you will have to reach out to your services team members or use the google forums.
Thanks,
Bill Patton