监听中动态注册时的服务名：如果没有设定service_names，将拼接db_unique_name和db_domain参数值来注册监听，（service_names优先级高），验证如下：。
----（很多文档里写的是db_name和db_domain这是不准确的）
本实验的db_domain为空。
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
1.db_unique_name为PRODA，db_name 为PROD，service_names 为空--reset参数值，监听状态中有一个服务：PRODA SQL> show parameter service_name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string
SQL> show parameter db_unique
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_unique_name string PRODA
SQL> show parameter db_name
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_name string PROD
SQL> show parameter db_doma
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_domain string
[oracle@ocm1 admin]$ lsnrctl status LSNR2
LSNRCTL for
Linux: Version 10.2.0.1.0 - Production on 09-APR-2014 23:36:38
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.bys.com)(PORT=1526)))
STATUS of the LISTENER
------------------------
Alias LSNR2
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 09-APR-2014 23:31:20
Uptime 0 days 0 hr. 5 min. 18 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/10.2.0.1/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/10.2.0.1/dbhome_1/network/log/lsnr2.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.bys.com)(PORT=1526)))
Services Summary...
Service "PRODA" has 1 instance(s).
Instance "PROD", status READY, has 4 handler(s) for this service.
2.db_unique_name为PRODA，db_name 为PROD，service_names 为PRO，监听状态中有两个服务：PRODA、PRO SQL> show parameter db_uni
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_unique_name string PRODA
SQL> show parameter service
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string PRO
SQL> show parameter db_n
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_name string PROD
SQL> show parameter db_do
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_domain string
[oracle@ocm1 admin]$ lsnrctl status LSNR2
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 09-APR-2014 23:51:30
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.bys.com)(PORT=1526)))
STATUS of the LISTENER
------------------------
Alias LSNR2
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 09-APR-2014 23:48:39
Uptime 0 days 0 hr. 2 min. 51 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/10.2.0.1/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/10.2.0.1/dbhome_1/network/log/lsnr2.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.bys.com)(PORT=15 |