记录下ORACEL RAC 修改字符集的步骤：
一：查看当前的字符集
服务器端字符集：
SQL> select userenv(\'language\') from dual;
USERENV(\'LANGUAGE\')
----------------------------------------------------
AMERICAN_AMERICA.ZHS16GBK
客户端字符集：
SQL> select * from v$nls_parameters;
二：修改：
[root@hp131 ~]# su - oracle
hp131-> sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Wed Oct 17 14:42:43 2012
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 1895825408 bytes
Fixed Size 2084840 bytes
Variable Size 436207640 bytes
Database Buffers 1442840576 bytes
Redo Buffers 14692352 bytes
Database mounted.
SQL> alter session set sql_trace=true;
Session altered.
SQL> alter system enable restricted session;
System altered.
SQL> alter system set job_queue_processes=0;
System altered.
SQL> alter system set aq_tm_processes=0;
System altered.
SQL> alter database open;
Database altered.
SQL> alter database character set INTERNAL_USE UTF8;
alter database character set INTERNAL_USE UTF8
*
ERROR at line 1:
ORA-12720: operation requires database is in EXCLUSIVE mode
关闭其中一个节点
hp131-> srvctl stop nodeapps -n hp132
SQL> alter system set cluster_database=false scope=spfile sid=\'wzticket1\';
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 1895825408 bytes
Fixed Size 2084840 bytes
Variable Size 436207640 bytes
Database Buffers 1442840576 bytes
Redo Buffers 14692352 bytes
SQL> Alter database mount exclusive;
Database altered.
SQL> Alter system enable restricted session;
System altered.
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
System altered.
SQL> Alter database open;
Database altered.
SQL> alter database character set INTERNAL_USE UTF8;
Database altered.
SQL> update props$ set VALUE$=\'ZHS16GBK\' where NAME=\'NLS_NCHAR_CHARACTERSET\';
1 row updated.
SQL> commit;
Commit complete.
SQL> alter system set cluster_database=true scope=spfile sid=\'wzticket1\';
System altered.