rac环境修改数据库字符集

denglj

实验目标：rac环境修改数据库字符集.

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

USERENV('LANGUAGE')

--------------------------------------------------------------------------------

AMERICAN_AMERICA.WE8MSWIN1252

SQL>alter system set cluster_database=false scope=spfile sid='pacs1'; (说明：此参数需修改，否则后面操作会报错)

Systemaltered.

SQL>exit

Disconnectedfrom Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bitProduction

With thePartitioning, Real Application Clusters, Automatic Storage Management, OLAP,

DataMining and Real Application Testing options

[oracle@hisdb1~]$ srvctl stop database -d pacs

启动数据库(节点1执行)

[oracle@hisdb1~]$ sqlplus / as sysdba

SQL*Plus:Release 11.2.0.4.0 Production on Sun Aug 7 10:55:25 2022

Copyright(c) 1982, 2013, Oracle.  All rights reserved.

Connectedto an idle instance.

SQL>startup nomount;

ORACLEinstance started.

TotalSystem Global Area 2956300288 bytes

FixedSize                  2256912 bytes

VariableSize             687869936 bytes

DatabaseBuffers         2248146944 bytes

RedoBuffers               18026496 bytes

SQL>alter database mount exclusive;

Databasealtered.

SQL>alter system enable restricted session;

Systemaltered.

SQL>alter system set job_queue_processes=0;

Systemaltered.

SQL>alter database open;

Databasealtered.

SQL>alter system enable restricted session;

Systemaltered.

SQL>alter database character set internal_use al32utf8;

Databasealtered.

SQL>alter system set cluster_database=true scope=spfile sid='pacs1';  (说明：此处需将cluster_database修改回true，否则后面启动数据库会报错)

Systemaltered.

SQL>shutdown immediate;

Databaseclosed.

Databasedismounted.

ORACLEinstance shut down.

SQL>exit

Disconnectedfrom Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bitProduction

With thePartitioning, Real Application Clusters, Automatic Storage Management, OLAP,

DataMining and Real Application Testing options

[oracle@hisdb1~]$ srvctl start database -d pacs

[oracle@hisdb1~]$ sqlplus / as sysdba

SQL*Plus:Release 11.2.0.4.0 Production on Sun Aug 7 11:00:14 2022

Copyright(c) 1982, 2013, Oracle.  All rightsreserved.

Connectedto:

OracleDatabase 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With thePartitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Data Miningand Real Application Testing options

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

USERENV('LANGUAGE')

----------------------------------------------------

AMERICAN_AMERICA.AL32UTF8

说明：节点2查询后字符集也变为al32utf8.非必要情况不要修改数据库字符集，以免造成其它未知异常.

一次新安装好的数据库，因为字符集未满足要求，经验丰富的DBA都建议删除后重新创建数据库.

非rac环境也可用该方法修改数据库字符集，不过cluster_database参数不用做处理.