今天单独启动了Data Guard的primary 数据库，出现了这个错误：ORA-03113: end-of-file on communication channel
[oracle@vmoel5u4 ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Dec 12 23:16:48 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 314572800 bytes
Fixed Size 1219160 bytes
Variable Size 88081832 bytes
Database Buffers 222298112 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
归结原因是例如以下：
Data Guard的数据库的启动，和关闭顺序非常重要
关闭：先关primary database, 后关闭standby database
启动：先启动standby database to mount, 后open primary database. 当然要记得在主备库上先于数据库启动监听哦
解决上面的错误例如以下：
一，在standby 端操作：
1，启动监听
[oracle@even oradata]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 20-JUN-2014 21:13:56
Copyright (c) 1991, 2005, Oracle. All rights reserved.
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/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=even.oracle.com)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=even.oracle.com)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 20-JUN-2014 21:13:56
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/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=even.oracle.com)(PORT=1521)))
Services Summary...
Service "OMR" has 1 instance(s).
Instance "OMR", status UNKNOWN, has 1 handler(s) for this service...
Service "SBDB" has 1 instance(s).
Instance "SBDB", status UNKNOWN, has 1 handler(s) for this service...
Service "SBDB_DGMGRL" has 1 instance(s).
Instance "SBDB", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
2，mount standby database
SQL> startup mount;
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 92276304 bytes
Database Buffers 188743680 bytes
Redo Buffers 2973696 bytes
Database mounted.
二，在primary 端操作
1，启动监听
[oracle@vmoel5u4 ~]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 12-DEC-2012 23:21:20
Copyright (c) 1991, 2005, Oracle. All rights reserved.
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/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=vmoel5u4.oracle.com)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=vmoel5u4.oracle.com)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 12-DEC-2012 23:21:20
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/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=vmoel5u4.oracle.com)(PORT=1521)))
Services Summary...
Service "DUPROD" has 1 instance(s).
Instance "DUPROD", 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...
Service "PROD" has 1 instance(s).
Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...
Service "PROD_DGMGRL" has 1 instance(s).
Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
2，打开primary数据库
SQL> startup ;
ORACLE instance started.
Total System Global Area 314572800 bytes
Fixed Size 1219160 bytes
Variable Size 88081832 bytes
Database Buffers 222298112 bytes
Redo Buffers 2973696 bytes
Database mounted.
Database opened.
如今OPEN数据库正常了。