PROCESSES specifies the maximum number of operating system user processes that can simultaneously connect to an Oracle database. Because Financial Management only works with dedicated servers, each connection requires a process. Each Financial Management application requires a minimum of 20 database connections in addition to the number specified by the Financial Management database connection pool setting. For example, if the Financial Management database connection pool setting is 40, then each Financial Management application on each application server requires at least 60 Oracle database connections.
Suggested setting: Refer to How to Calculate the Number of Processes for Oracle Database Release 11g.