As with any Java-based web application, you can sometimes improve performance by assigning particular values to Java Virtual Machine options. The default location for environment configuration is located at /usr/local/jive/applications/sbs/bin/instance. Within this file, it is possible to edit JVM maximum memory settings by adding a value for JVM_HEAP_MAX. This value is expressed in MB, so for example, to set the max heap available to the application to 4GB, add the following lines to the instance file:
JVM_HEAP_MAX=4096
JVM_HEAP_MIN=4096
Jive recommends setting the MIN and MAX values the same to ensure that the system is capable of allocating the desired maximum value and that an OutOfMemoryException will not occur during runtime.
Note that in addition to the heap designation above, a typical Jive SBS instance will consume 512M of JVM "PermGen" heap. In the above example, increasing the MIN and MAX values to 4GB would result in a JVM process consuming slightly more than 4.5GB RAM.