Oracle10g EM Console配置

在10g
中，我们可能会经常遇到OEM不能正常使用的问题，但导致问题的原因不尽相同，最后绝大多数问题可以通过emca
这个命令来解决，详细的说明可以查看连机帮助，下面给出一些常用的命令，及实例步骤。

创建一个EM资料库

emca -repos create

重建一个EM资料库

emca -repos recreate

删除一个EM资料库

emca -repos drop

配置数据库的
Database Control

emca -config dbcontrol db

删除数据库的
Database Control配置

emca -deconfig dbcontrol db

重新配置db
control的端口，默认端口在1158

emca -reconfig ports emca -reconfig ports -dbcontrol_http_port 1160 emca -reconfig ports -agent_port 3940

注：查看端口号可查如下路径。

先设置ORACLE_SID环境变量后，启动EM console服务

emctl start dbconsole

先设置ORACLE_SID环境变量后，停止EM console服务

emctl stop dbconsole

先设置ORACLE_SID环境变量后，查看EM console服务的状态

emctl status dbconsole

配置dbconsole的步骤

emca -repos create emca -config dbcontrol db emctl start dbconsole

重新配置dbconsole的步骤

emca -repos drop emca -repos create emca -config dbcontrol db emctl start dbconsole

3、添加standby logfile（也可以不加）

为主数据库添加"备用联机日志文件"，这里要保证备日志文件与主库联机日志文件相同大小。

添加备用日志文件是规则：备用日志最少应该比redo log 多一个。推荐的备重做日志数依赖于主数据库上的线程数。

（每线程日志文件最大数目
+ 1 ） * 线程数

SQL> select GROUP#,MEMBERS,BYTES/1024/1024 from v\$log; GROUP# MEMBERS BYTES/1024/1024 ---------- ---------- --------------- 1 1 50 2 1 50 3 1 50SQL> select GROUP#,MEMBER from v\$logfile; GROUP# MEMBER ---------- ---------------------------------------- 3 /oracle/oradata/orcl/redo03.log 2 /oracle/oradata/orcl/redo02.log 1 /oracle/oradata/orcl/redo01.logSQL> alter database add standby logfile 2 group 4 ('/oracle/oradata/orclstd_redo04a.log','/oracle/oradata/orcl/std_redo04b.log') size 50m, 3 group 5 ('/oracle/oradata/orcl/std_redo05a.log','/oracle/oradata/orcl/std_redo05b.log') size 50m, 4 group 6 ('/oracle/oradata/orcl/std_redo06a.log','/oracle/oradata/orcl/std_redo06b.log') size 50m, 5 group 7 ('/oracle/oradata/orcl/std_redo07a.log','/oracle/oradata/orcl/std_redo08b.dbf') size 50m;Database altered.

4、修改主库参数文件：

SQL> create pfile='/oracle/orcl.ora' from spfile;File created.orcl.__db_cache_size=79691776 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__shared_pool_size=71303168 orcl.__streams_pool_size=0 *.audit_file_dest='/oracle/admin/orcl/adump' *.background_dump_dest='/oracle/admin/orcl/bdump' *.compatible='10.2.0.1.0' *.control_files='/oracle/oradata/orcl/control01.ctl','/oracle/oradata/orcl/control02.ctl','/oracle/oradata/orcl/control03.ctl' *.core_dump_dest='/oracle/admin/orcl/cdump' *.db_block_size=8192 *.db_domain='' *.db_file_multiblock_read_count=16 *.db_name='orcl' *.db_recovery_file_dest='/oracle/flash_recovery_area' *.db_recovery_file_dest_size=2147483648 *.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)' *.job_queue_processes=10 *.DB_UNIQUE_NAME='orclpri' ##必须 定义每个数据库的唯一标识 *.log_archive_config='DG_CONFIG=(orclpri,orclstandby)' ###必须 *.log_archive_dest_1='LOCATION=/arch1/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES)' DB_UNIQUE_NAME='orclpri' ###必须 本地的归档路径 *.LOG_ARCHIVE_DEST_2='SERVICE=orclstandby arch ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orclstandby' ###必须(远程服务器端的归档日志) *.LOG_ARCHIVE_DEST_STATE_1=ENABLE *.LOG_ARCHIVE_DEST_STATE_2=ENABLE *.FAL_SERVER=orclstandby ### 定义FAL服务器的Oracle Net服务的名称 *.FAL_CLIENT=orclpri ### 定义备数据库的Oracle Net服务名 （这两个参数在主库可有可无，但备库必须有。ORACLE 老外工程师说这个必须有^_^） *.open_cursors=300 *.pga_aggregate_target=16777216 *.processes=150 *.remote_login_passwordfile='EXCLUSIVE' *.sga_target=167772160 *.undo_management='AUTO' *.undo_tablespace='UNDOTBS1' *.user_dump_dest='/oracle/admin/orcl/udump' *.STANDBY_FILE_MANAGEMENT=AUTO ###设置为AUTO,使得当数据文件添加到主数据库或者从主数据库删除的时候,对应的修改能够在备用数据库中自动执行

5、用pfile启动，再重新创建spfile.

SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup pfile='/oracle/orcl.ora' ORACLE instance started.Total System Global Area 167772160 bytes Fixed Size 1218292 bytes Variable Size 79694092 bytes Database Buffers 79691776 bytes Redo Buffers 7168000 bytes Database mounted. Database opened. SQL> SQL> create spfile from pfile='/oracle/orcl.ora';File created

6、在主库创建密码文件、以及控制文件。

[oracle@node2 oracle]\$ orapwd file='/oracle/product/10.2.0/db_1/dbs/orapworcl.ora' password=oracle entries=10SQL> ALTER DATABASE CREATE STANDBY CONTROLFILE AS '/oracle/oradata/orcl/standby.ctl';Database altered.

7、TNS信息如下：

主库ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.239)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) orclpri = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.239)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) orclstandby = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.211)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) )EXTPROC_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) (CONNECT_DATA = (SID = PLSExtProc) (PRESENTATION = RO) ) ) 监听信息如下SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SERVICE_NAME=orclpri) (ORACLE_HOME = /oracle/product/10.2.0/db_1) (SID_NAME=ORCL) ) )LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521)) (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) )

8、把数据库scp到备库相应的目录（包括密码文件、standby controlfile）


二备机操作


1、备份的参数文件内容

orcl.__db_cache_size=79691776 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__shared_pool_size=71303168 orcl.__streams_pool_size=0 *.audit_file_dest='/oracle/admin/orcl/adump' *.background_dump_dest='/oracle/admin/orcl/bdump' *.compatible='10.2.0.1.0' *.control_files='/oracle/oradata/orcl/control01.ctl','/oracle/oradata/orcl/control02.ctl','/oracle/oradata/orcl/control03.ctl' *.core_dump_dest='/oracle/admin/orcl/cdump' *.db_block_size=8192 *.db_domain='' *.db_file_multiblock_read_count=16 *.db_name='orcl' *.db_recovery_file_dest='/oracle/flash_recovery_area' *.db_recovery_file_dest_size=2147483648 *.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)' *.job_queue_processes=10*.DB_UNIQUE_NAME='orclstandby' ##必须 定义每个数据库的唯一标识 *.log_archive_config='DG_CONFIG=(orclpri,orclstandby)' ###必须 *.log_archive_dest_1='LOCATION=/arch1/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES)' DB_UNIQUE_NAME='orclstandby' ###必须 本地的归档路径 *.LOG_ARCHIVE_DEST_2='SERVICE=orclpri arch ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orclpri' ###必须(远程服务器端的归档日志) *.LOG_ARCHIVE_DEST_STATE_1=ENABLE *.LOG_ARCHIVE_DEST_STATE_2=ENABLE *.FAL_SERVER=orclstandby ### 定义FAL服务器的Oracle Net服务的名称 *.FAL_CLIENT=orclpri ### 定义备数据库的Oracle Net服务名 （这两个参数在主库可有可无，但备库必须有。ORACLE 老外工程师说这个必须有^_^） *.open_cursors=300 *.pga_aggregate_target=16777216 *.processes=150 *.remote_login_passwordfile='EXCLUSIVE' *.sga_target=167772160 *.undo_management='AUTO' *.undo_tablespace='UNDOTBS1' *.user_dump_dest='/oracle/admin/orcl/udump' *.STANDBY_FILE_MANAGEMENT=AUTO

2、修改上面参数文件里的

*.control_files='/oracle/oradata/orcl/control01.ctl','/oracle/oradata/orcl/control02.ctl','/oracle/oradata/orcl/control03.ctl' 为： *.control_files='/oracle/oradata/orcl/standby.ctl' ##在主机上生成的那个控制文件，也可以多放几份

3、TNS信息如下：

备库ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.239)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) orclpri = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.239)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) orclstandby = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.37.211)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) )EXTPROC_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) (CONNECT_DATA = (SID = PLSExtProc) (PRESENTATION = RO) ) ) 监听信息如下SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SERVICE_NAME=orclstandby) (ORACLE_HOME = /oracle/product/10.2.0/db_1) (SID_NAME=ORCL) ) )LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521)) (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) )

4、用创建的参数文件启动数据库到nomount

SQL> startup pfile='/oracle/orclstandby.ora' nomount; ORACLE instance started.Total System Global Area 167772160 bytes Fixed Size 1218316 bytes Variable Size 62916852 bytes Database Buffers 100663296 bytes Redo Buffers 2973696 bytesSQL> ALTER DATABASE MOUNT STANDBY DATABASE;Database altered.

5、修改备库处于应用归档状态

SQL> alter database recover managed standby database disconnect from session;Database altered.

如果主库从不过来归档，可以通过在主库侧手工修改参数如下：

ALTER SYSTEM SET log_archive_dest_state_2='DEFER' SCOPE=MEMORY; ALTER SYSTEM SET log_archive_dest_state_2='ENABLE' SCOPE=MEMORY;

7、测试

通过在主库执行alter
system switch logfile；切换日志可以观察到备库会自动应用通过主库传过来的日志。


三、切换测试


1、在主库端

select switchover_stats from v\$database;

如果是to
standby 表可以正常切换。

直接执行

ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY;

否则执行：

ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;shutdown immediate; startup nomount; alter database mount standby database;

如果是to_primary 表可以正常切换。


2、在备库

在备库

SELECT SWITCHOVER_STATUS FROM V\$DATABASE;

执行：

ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;

否则执行：

ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY WITH SESSION SHUTDOWN;shutdown immediate; startup;

然后观察主备库日志，如果正常的话会看到备库会自动应用日志。