Here is a link to clustering SAS 9.3 Clustering Web Applications, and has specific sections for clustering JBOSS to allow for multiple JVM's as bwasicak said creating SASServer , This will allow you to spread your applications across multiple instances, i.e. WRS on SASServer1 and IDP on SASServer2 each with different configurations for things like Java Heap Sizes. http://ftp.sas.com/techsup/download/blind/WebApplicationClustering.pdf
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