oracle之session會話

1.select * from v$session;

2.備註：v$session 裏的session 數不準確， 沒有計算recursive call 的session 數, 用下面的來查看

   語句：select 'total session num' as name, count(*) as scount from x$ksuse where bitand(ksspaflg,1) !=0;

   追加：必須以sys用戶登錄sqlplus,切換用戶：conn sys as sysdba.

3.這裏有個網址：Recursive Sessions and ORA-00018: maximum number of sessions exceeded.
http://tech.e2sn.com/oracle/oracle-internals-and-architecture/recursive-sessions-and-ora-00018-maximum-number-of-sessions-exceeded.