查看Oracle某时刻的客户端IP连接情况
1、查看每个oracle帐户的连接总数
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select username,count(username) from v$session where username is not null group by username |
2、缺省从 v$session 中不能直接获得客户端 IP，可以在数据库中创建一个追踪客户端IP地址的触发器：
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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、比较常用的显示客户端信息的sql：
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select sid,serial#,username,program,machine,client_info from v$session where username is not null -- and status = 'ACTIVE' order by username,program,machine; |
显示结果：
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1 102 2986 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 2 375 10078 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 3 858 1751 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 4 761 5406 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 5 803 3590 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 6 448 2525 AMS_TEST JDBC Thin Client MICROSO-V22G1JA 192.168.0.92 7 654 10009 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 8 659 9547 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 9 664 7554 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 10 693 6960 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 11 714 3672 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 12 724 13457 HDCZOA JDBC Thin Client WWW-18843A7DA64 192.168.0.115 |
4、查看当前Oracle的连接数
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select count(*) from v$process; |
5、查看数据库允许的最大连接数
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select value from v$parameter where name='processes'; |
6、修改最大连接数
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alter system set processes=3000 scope=spfile; |
7、业务IP连接数查询
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set pagesize 1000 line 1000 select count(1), client_info from v$session where username is not null group by client_info order by 1 desc; |