Passing additional Java command line parameters to Output Post Processing

 I would like to pass additional java command line parameters to the java based OPP Concurrent Manager in e-Business Suite 11i. We're on 11.5.10.2 with BI Publisher at 5.6.3. Our host OS is IBM AIX V6.1 and the IBM Java runtime is 1.6. I want to explicity set the garbage collection algorithm and determine the garbage collection overhead. I would normally pass "-verbose:gc -Xgcpolicy:optavgpause" on the command line.
We set the Apps environment variable / context - "s_jvm_options" - at the Web App tier to set this on the OACore servlet engines.
Here's our setting:
<jvm_options oa_var="s_jvm_options" osd="IBM_AIX">-Xmx1024M -Xms64M -verbose:gc -Xgcpolicy:optavgpause</jvm_options>