你说的进程数是process参数吗？cpu_count*10来配肯定是不够的。具体还是要根据应用本身负载情况来，比如有的应用100个会话都是不干活的，有的应用5个会话非常繁忙。合理利用CPU资源，还是需要进行压测来满足应用的并发请求。

关于进程、会话、连接之间没有特定的关系，可以是一一对应，也可以是一对多，可以参考askTom：

A connection is a physical circuit between you and the database. A connection might be one of many types – most popular begin DEDICATED server and SHARED server. Zero, one or more sessions may be established over a given connection to the database as show above with sqlplus. A process will be used by a session to execute statements. Sometimes there is a one to one relationship between CONNECTION->SESSION->PROCESS (eg: a normal dedicated server connection). Sometimes there is a one to many from connection to sessions (eg: like autotrace, one connection, two sessions, one process). A process does not have to be dedicated to a specific connection or session however, for example when using shared server (MTS), your SESSION will grab a process from a pool of processes in order to execute a statement. When the call is over, that process is released back to the pool of processes.

https://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:5671284058977