第五步，配置listener.ora和tnsnames.ora文件，内容如下：

#############################listener.ora##################################

LISTENER=

  (DESCRIPTION=

    (ADDRESS_LIST=

      (ADDRESS=(PROTOCOL=tcp)(HOST=secdb1)(PORT=1521))

      (ADDRESS=(PROTOCOL=ipc)(KEY=extproc))))

LSNR2=

  (DESCRIPTION=

    (ADDRESS_LIST=

      (ADDRESS=(PROTOCOL=tcp)(HOST=secdb1)(PORT=1526))

      (ADDRESS=(PROTOCOL=ipc)(KEY=extproc1))))

SID_LIST_LISTENER=

  (SID_LIST=

    (SID_DESC=

      (GLOBAL_DBNAME=PROD)

      (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

      (SID_NAME=PROD))

    (SID_DESC=

      (SID_NAME=plsextproc)

      (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)

      (PROGRAM=extproc)))

############################################################################

###################################tnsnames.ora#############################

LSNR2=

      (ADDRESS=(PROTOCOL=tcp)(HOST=secdb1)(PORT=1526))

PROD=

 (description=

  (address=(protocol=tcp)(host=secdb1)(port=1521))

  (connect_data=

    (service_name=PROD)

    (server=dedicated)))

PROD_S=

 (description=

  (address=(protocol=tcp)(host=secdb1)(port=1526))

  (connect_data=

    (service_name=PROD)

    (server=SHARED)))

PROD_1526=

 (description=

  (address=(protocol=tcp)(host=secdb1)(port=1526))

  (connect_data=

    (service_name=PROD)

    (server=dedicated)))

 

第六步，修改local_listener参数

SYS@PROD>show parameter local

 

NAME                   TYPE        VALUE

------------------------------------ ----------- ------------------------------

local_listener             string

log_archive_local_first              boolean     TRUE

SYS@PROD>alter system set local_listener='LSNR2';

 

System altered.

 

SYS@PROD>show parameter local_listener

 

NAME                   TYPE        VALUE

------------------------------------ ----------- ------------------------------

local_listener              string      LSNR2

 

第七步，先停掉刚才启动的监听

LSNRCTL> stop

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))

The command completed successfully

 

第八步，先后启动两个监听listener  和  lsnr2

LSNRCTL> start listener

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

 

TNSLSNR for Linux: Version 10.2.0.1.0 - Production

System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/liste ner.ora

Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener .log

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT =1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))

 

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))

STATUS of the LISTENER

------------------------

Alias                     listener

Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production

Start Date                26-JUL-2012 21:40:56

Uptime                    0 days 0 hr. 0 min. 0 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/list ener.ora

Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listen er.log

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT=1521)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))

Services Summary...

Service "PROD" has 1 instance(s).

  Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...

Service "plsextproc" has 1 instance(s).

  Instance "plsextproc", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

 

 

LSNRCTL> start lsnr2

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

 

TNSLSNR for Linux: Version 10.2.0.1.0 - Production

System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora

Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr2.log

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT=1526)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc1)))

 

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=secdb1)(PORT=1526))

STATUS of the LISTENER

------------------------

Alias                     lsnr2

Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production

Start Date                26-JUL-2012 21:42:20

Uptime                    0 days 0 hr. 0 min. 0 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr2.log

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT=1526)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc1)))

The listener supports no services

The command completed successfully

 

 

第九步，等待一会后（即，等待PMON把实例注册到监听上），查看两个监听的状态

LSNRCTL> status listener

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))

STATUS of the LISTENER

------------------------

Alias                     listener

Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production

Start Date                26-JUL-2012 22:27:21

Uptime                    0 days 0 hr. 1 min. 47 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT=1521)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))

Services Summary...

Service "PROD" has 1 instance(s).

  Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...

Service "plsextproc" has 1 instance(s).

  Instance "plsextproc", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

 

LSNRCTL> status lsnr2

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=secdb1)(PORT=1526))

STATUS of the LISTENER

------------------------

Alias                     lsnr2

Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production

Start Date                26-JUL-2012 22:26:56

Uptime                    0 days 0 hr. 2 min. 22 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora

Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr2.log

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=secdb1.localdomain)(PORT=1526)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc1)))

Services Summary...

Service "PROD" has 1 instance(s).

  Instance "PROD", status READY, has 1 handler(s) for this service...

Service "PROD_XPT" has 1 instance(s).

  Instance "PROD", status READY, has 1 handler(s) for this service...

The command completed successfully

结论：（3）oracle实例在启动过程中，或使用命令ALTER SYSTEM REGISTER，或每隔一分钟，PMON进程会向监听进行动态注册。如果是先启动的监听，后起的实例，那么实例会迅速动态注册到监听上；如果是先启动的实例，再启动的监听，那么要等待PMON进程的轮询时间到了之后才能注册到监听上~~~~~为了减少等待时间，就可以使用命令alter system register进行快速注册。

《官方文档》上的原话：

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~“When alistener starts after the Oracle instance starts, and the listener is listed for service registration, registration does not occur until the next time the Oracle Database process monitor (PMON) discovery routine starts. By default, PMON discovery occurs every 60 seconds.

To override the 60-second delay, use the SQL ALTER SYSTEM REGISTER statement. This statement forces the PMON process to register the service immediately.

Oracle recommends that you create a script. to run this statement immediately after starting the listener. If you run this statement while the listener is up and the instance is already registered, or while the listener is down, then the statement has no effect.”~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

~~新手上路，多多指教~~

小妞elaine

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