查看oracle 最大并发值

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如何查看ORACLE的并发值，也就是说在某一秒同时在线的人数

可是查看v$license视图

v$license视图：

里面记录了Oracle最大的并发数以及当前用户的连接数，

SQL> select SESSIONS_CURRENT,SESSIONS_HIGHWATER from v$license;

SESSIONS_CURRENT SESSIONS_HIGHWATER
—————- ——————
299                826

SQL> select count(*) from v$session where type=’USER’;

COUNT(*)
———-
299

该试图中的SESSIONS_CURRENT就等于select count(*) from v$session where TYPE = ‘USER’

v$license视图官方文档有如下描述：

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

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