AIX ulimit requirement for NW7 multi server nodes

Dear Experts,

Recently we are trying to add more EP java server nodes to make the Portal have better response time. However, some server node failed to start at the beginning. After some investigation, we realized that it was because the ulimit data was not set to "unlimit". Is there any document mentioning the portal <sid>adm ulimit values for multiple server nodes? Our Unix server administrator does not allow us to set everything to "unlimit" unless there is some sap document to support.

Thanks&Regards,

Li Bin