--==========================================
--使用OEM,SQL*Plus,iSQL*Plus 管理Oracle实例
--==========================================
/*
一、管理组件
Oracle 10g数据库管理包含三个组件,本文主要介绍Database Control,SQL*Plus及iSQL*Plus
Database instance(数据库实例) -->系统使用的后台进程
Listener (监听器) -->监听客户端连接到数据库
Management interfance
Database Control -->OEM
Management agent (when using Grid Control) --网格管理
二、使用OEM管理Oracle
1.关于OEM:Oracle 从i开始就随软件提供企业管理器(OEM)
在g中,oracle在dbca建库过程中会出现四个用户:sys,system,dbsnap,sysman
(--dbsnap 用户用于OEM智能代理管理工作,sysman用户则是OEM的管理员帐号)
如果在dbca建库过程中没有选择安装OEM,则没有dbsnap和sysman用户,如果在dbca建库时选择启用database control管理数据库,
则需要在数据库中建立一个sysman的schema,用于保存OEM的一些数据,这个就是OEM的资料档案库(repository),在G版本中,
这个库存储在sysaux表空间中
2.OEM的启动和关闭
启动:emctl start dbconsole 启动后用浏览器http://IP:1158/em 来登陆OEM,进行图形化操作数据库
关闭:emctl stop dbconsole
状态:emctl status dbconsole */
--下面演示EM启动到停止的过程
[oracle@robinson scripts]$ emctl start dbconsole --启动
TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://robinson.com:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10g Database Control ...................... started.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/10g/robinson.com_orcl/sysman/log
[oracle@robinson scripts]$ emctl status dbconsole --查看状态
TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://robinson.com:1158/em/console/aboutApplication
Oracle Enterprise Manager 10g is running.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/10g/robinson.com_orcl/sysman/log
[oracle@robinson scripts]$ emctl stop dbconsole --停止
TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://robinson.com:1158/em/console/aboutApplication
Stopping Oracle Enterprise Manager 10g Database Control ...
... Stopped.
/*
3.重建OEM
由于EM需要J2EE环境支持,正常创建后,在$ORACLE_HOME目录下将会建立一个
类似$ORACLE_HOME/oc4j/j2ee/OC4J_DBConsole_<hostname>_<sid>的目录,如果此目录不存在,则EM将无法启动。
另外,如果服务器修改过主机名等信息,导致OEM可能无法启动,此时需要重新配置EM。
使用emca命令来重建EM档案库,关于emca的用户,使用emca -h 来查看详细说明 */
[oracle@robinson scripts]$ emca -config dbcontrol db -repos recreate
STARTED EMCA at Apr 21, 2010 3:09:04 PM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle. All rights reserved.
Enter the following information:
Database SID: orcl
Database Control is already configured for the database orcl
You have chosen to configure Database Control for managing the database orcl
This will remove the existing configuration and the default settings and perform a fresh configuration
Do you wish to continue? [yes(Y)/no(N)]: y
Listener port number: 1521
Password for SYS user:
Password for DBSNMP user:
Password for SYSMAN user:
Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
-----------------------------------------------------------------
You have specified the following settings
Database ORACLE_HOME ................ /u01/app/oracle/10g
Database hostname ................ robinson.com
Listener port number ................ 1521
Database SID ................ orcl
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............
-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: y
Apr 21, 2010 3:09:24 PM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/10g/cfgtoollogs/emca/orcl/emca_2010-04-21_03-09-04-PM.log.
Apr 21, 2010 3:09:25 PM oracle.sysman.emcp.util.DBControlUtil stopOMS
INFO: Stopping Database Control (this may take a while) ...
Apr 21, 2010 3:09:32 PM oracle.sysman.emcp.EMReposConfig dropRepository
INFO: Dropping the EM repository (this may take a while) ...
Apr 21, 2010 3:11:41 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Apr 21, 2010 3:11:41 PM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) ...
Apr 21, 2010 3:16:01 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Apr 21, 2010 3:16:08 PM oracle.sysm