查看dataguard 备库报警日志的时候发现有ORA-12514: TNS:listener does not currently know of service requested in connect descriptor 错误~！
错误的意思是listener 不知道连接解析器中的请求服务，这里要说静态监听和动态监听了。
动态注册是在instance启动的时候PMON进程根据init.ora中的instance_name,service_names两个参数将实例和服务动态注册到listener中。
静态注册就是实例启动时读取listener.ora文件的配置，将实例和服务注册到监听程序。无论何时启动一个数据库，默认地都有两条信息注册到监听器中：数据库服务器对应的实例和服务。
搭建dataguard过程中，先启动的数据库，没有在listener.ora 中设置静态监听。重新设置后。
# listener.ora Network Configuration File: /opt/oracle/10.2.0/orcl/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = orclpdg)
(ORACLE_HOME = /opt/oracle/10.2.0/orcl)
)
--增加如下内容
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /opt/oracle/10.2.0/orcl)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.250.7.230 )(PORT = 1521))
)
)
"listener.ora" 24L, 609C 已写入
oracle@yangDB2:/opt/oracle/10.2.0/orcl/network/admin>lsnrctl
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 25-AUG-2011 09:50:13
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 24-AUG-2011 21:13:15
Uptime 0 days 12 hr. 37 min. 2 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/10.2.0/orcl/network/admin/listener.ora
Listener Log File /opt/oracle/10.2.0/orcl/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.250.7.230)(PORT=1521)))
Services Summary...
Service "orclpdg" has 1 instance(s).
Instance "orclpdg", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL> reload
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
The command completed successfully
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 24-AUG-2011 21:13:15
Uptime 0 days 12 hr. 37 min. 12 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/10.2.0/orcl/network/admin/listener.ora
Listener Log File /opt/oracle/10.2.0/orcl/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.250.7.230)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orclpdg" has 1 instance(s).
Instance "orclpdg", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
LSNRCTL> exit
再次查看告警日志文件
oracle@yangDB2:/opt/oracle/std_arch>tf
Fetching gap sequence in thread 1, gap sequence 46-46
FAL[client, MRP0]: Error 12514 connecting to orcl for fetching gap sequence
Thu Aug 25 09:24:32 2011
Errors in file /opt/oracle/admin/orcl/bdump/orclpdg_mrp0_10763.trc:
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor --修改之前的
Thu Aug 25 09:24:57 2011
RFS[1]: Archived Log: '/opt/oracle/std_arch/log1_46_758478551.arc'
Thu Aug 25 09:25:02 2011
Media Recovery Log /opt/oracle/std_arch/log1_46_758478551.arc
Media Recovery Waiting for thread 1 sequence 47 (in transit)
Thu Aug 25 09:51:15 2011
Primary database is in MAXIMUM PERFORMANCE mode
RFS[2]: Successfully opened standby log 4: '/opt/oracle/oradata/orclpdg/redo04.log'
Thu Aug 25 09:51:18 2011
Media Recovery Log /opt/oracle/std_arch/log1_47_758478551.arc
Media Recovery Waiting for thread 1 sequence 48 (in transit)
Thu Aug 25 10:02:08 2011
Primary database is in MAXIMUM PERFORMANCE mode
RFS[2]: Successfully opened standby log 5: '/opt/oracle/oradata/orclpdg/redo05.log'
Thu Aug 25 10:02:08 2011
没有
ORA-12514报错了！
