系统版本:

Oracle Linux Server release 5.7

数据库版本：

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

查看字符集：

SQL>select userenv('language') from dual;

USERENV('LANGUAGE')
--------------------------------------------------------------------------------
AMERICAN_AMERICA.AL32UTF8

关闭RAC其中一个节点：

[root@rac1 ~]#cd /u01/app/11.2.0/grid/bin/crsctl

[root@rac1 ~]#./crsctl stop cluster

在另一个节点查看oracle启动参数：

SQL>show parameter spfile;

NAME TYPE VALUE
------------------------------------ --------------------------------- ------------------------------
spfile string +DG1/yoon/spfileyoon.ora

若VALUE为空，表示用pfile参数启动，即修改为spfile参数启动：

SQL>CREATE SPFILE FROM PFILE;

SQL>shutdown immediate;

SQL>startup;

执行：

SQL>alter system set cluster_database=false scope=spfile;

关闭数据库：

SQL>shutdown immediate;

SQL>startup mount;

SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
System altered.
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
System altered.
SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
System altered.
SQL> alter database open;
Database altered.

修改字符集：

SQL> ALTER DATABASE character set INTERNAL_USE ZHS16GBK;
Database altered.

恢复数据库为RAC：

SQL> alter system set cluster_database=true scope=spfile;

SQL> shutdown immediate;

SQL>startup;

启动另一节点cluster服务并验证：

[root@rac1 ~]#./crsctl start cluster

查看字符集：

SQL>select userenv('language') from dual;

USERENV('LANGUAGE')
--------------------------------------------------------------------------------
AMERICAN_AMERICA.ZHS16GBK