查看Oracle某時刻的客戶端IP連接情況

1、查看每個oracle帳戶的連接總數

select username,count(username) from v$session where username is not null group by username

 

2、缺省從 v$session 中不能直接獲得客戶端 IP，可以在數據庫中創建一個追蹤客戶端IP地址的觸發器：

create or replace trigger on_logon_trigger after logon on database
begin
    dbms_application_info.set_client_info(sys_context('userenv', 'ip_address'));
end;
/

 

3、比較常用的顯示客戶端信息的sql：

select sid,serial#,username,program,machine,client_info
from v$session
where username is not null  -- and status = 'ACTIVE'
order by username,program,machine;

  顯示結果：

1   102 2986    AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
2   375 10078   AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
3   858 1751    AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
4   761 5406    AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
5   803 3590    AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
6   448 2525    AMS_TEST    JDBC Thin Client    MICROSO-V22G1JA 192.168.0.92
7   654 10009   HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115
8   659 9547    HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115
9   664 7554    HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115
10  693 6960    HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115
11  714 3672    HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115
12  724 13457   HDCZOA  JDBC Thin Client    WWW-18843A7DA64 192.168.0.115

 

 

4、查看當前Oracle的連接數

select count(*) from v$process;

 5、查看數據庫允許的最大連接數

select value from v$parameter where name='processes';

 6、修改最大連接數

alter system set processes=3000 scope=spfile;