What is the recommended ulimit settings for EAP 6.4 ?

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Issue

We would like to get all of the recommended ulimit settings for EAP 6.4 / JBPM 6.1 running on Red Hat. We're very interested to know the recommended open file setting ( -n ). We currently have open files set to 1024, and we are starting to get 'too many open files' errors in the EAP logs.
What is the recommended ulimit settings for EAP 6.4 ?

Environment

Red Hat JBoss Enterprise Application Platform (EAP)
- All versions

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