Oracle之DBCA中看不到已启动instance与处理方法

一、问题描述：单位一套测试Oracle数据库，本想用DBCA看看数据库配置信息，当然也是手闲得慌，谁想到竟然出现下面的画面。创建新的数据，配置数据库操作按键是灰色，不让点击。这是什么情况，实例没有启动，不可能啊，刚刚还登录过呢。好吧，开始处理过程之旅。二、处理方法：1. 检查/etc/oratab文件，发现关于路径的信息都是之前安装的ORACLE软件目录（/u01/.....）与现在的软件目录（/home/oracle/app/.....）不一致。修改前：[oracle@tora01 etc]$ cat oratab
## This file is used by ORACLE utilities. It is created by root.sh# and updated by either Database Configuration Assistant while creating# a database or ASM Configuration Assistant while creating ASM instance.# A colon, ":", is used as the field terminator. A new line terminates# the entry. Lines beginning with a pound sign, "#", are comments.## Entries are of the form:# $ORACLE_SID:$ORACLE_HOME::## The first and second fields are the system identifier and home# directory of the database respectively. The third filed indicates# to the dbstart utility that the database should , "Y", or should not,# "N", be brought up at system boot time.## Multiple entries with the same $ORACLE_SID are not allowed.##holytest:/u01/app/oracle/product/11.2.0/db_1:N修改后：[oracle@tora01 etc]$ cat oratab## This file is used by ORACLE utilities. It is created by root.sh# and updated by either Database Configuration Assistant while creating# a database or ASM Configuration Assistant while creating ASM instance.# A colon, ":", is used as the field terminator. A new line terminates# the entry. Lines beginning with a pound sign, "#", are comments.## Entries are of the form:# $ORACLE_SID:$ORACLE_HOME::## The first and second fields are the system identifier and home# directory of the database respectively. The third filed indicates# to the dbstart utility that the database should , "Y", or should not,# "N", be brought up at system boot time.## Multiple entries with the same $ORACLE_SID are not allowed.##holytest:/home/oracle/app/oracle/product/11.2.0/dbhome_1:N2. 再次启动DBCA进行验证，发现恢复正常三、总结：一次小小的发现，对oratab文件的了解又深入了一点点。该文件最后那个N，如果你需要数据自动启动的话，要改为Y，这些都是经验啊，还要继续努力学习。更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=12本文永久更新链接地址