转抄pub帖子：
可以参考v$license中的sessions_highwater
测试了一下确实可以反映最大连接数
SQL> select * from v$license
2 ;
SESSIONS_MAX SESSIONS_WARNING SESSIONS_CURRENT SESSIONS_HIGHWATER USERS_MAX
------------ ---------------- ---------------- ------------------ ----------
0 0 27 48 0
顺便把official document 也贴出来给大家看看
V$LICENSE
This view contains information about license limits.
Column Datatype Description
SESSIONS_MAX
NUMBER
Maximum number of concurrent user sessions allowed for the instance
SESSIONS_WARNING
NUMBER
Warning limit for concurrent user sessions for the instance
SESSIONS_CURRENT
NUMBER
Current number of concurrent user sessions
SESSIONS_HIGHWATER
NUMBER
Highest number of concurrent user sessions since the instance started
USERS_MAX
NUMBER
Maximum number of named users allowed for the database
如何得知生产系统高峰时期的最大连接数？
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/9599/viewspace-472948/ ，如需转载，请注明出处，否则将追究法律责任。
