JVM config allows you to specify various parameters for your specific environment and JVM and generates optimized JVM options. One of the common issues we see in production environments is high garbage collection pause times. These pause times can have systemic effects. By default JVM config will product options that mitigate long pause times and allows you to further tune based on your specific needs.
Not only does JVM config help tune to avoid common problems, but it also explains why each option is generated and links back to the Red Hat knowledge base for known issues and solutions.