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启动 Oracle 11g RAC 数据库时出现以下错误。只能启动其中一个节点, 另一个节点启动不了。可能是以前修改 cluster_database 这个参数引起的。在 Oracle RAC 架构这个参数必须设置为 TRUE。
错误信息:
ORA-01102: cannot mount database in EXCLUSIVE mode
解决方法:
rac1 节点:
SQL> show parameter cluster_database;
NAME TYPE VALUE
———————————— ———– ——————————
cluster_database boolean FALSE
cluster_database_instances integer 1
SQL> alter system set cluster_database=true scope=spfile;
System altered.
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
Total System Global Area 830930944 bytes
Fixed Size 2257800 bytes
Variable Size 566234232 bytes
Database Buffers 260046848 bytes
Redo Buffers 2392064 bytes
Database mounted.
Database opened.
SQL> select open_mode from v$database;
OPEN_MODE
——————–
READ WRITE
SQL> show parameter cluster_database;
NAME TYPE VALUE
———————————— ———– ——————————
cluster_database boolean TRUE
cluster_database_instances integer 2
SQL>
rac2 节点:
[oracle@rac2 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Thu Sep 29 10:14:16 2016
Copyright (c) 1982, 2013, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORA-01102: cannot mount database in EXCLUSIVE mode – 没有修改参数前报错, 修改后启动成功
SQL> startup
ORACLE instance started.
Total System Global Area 830930944 bytes
Fixed Size 2257800 bytes
Variable Size 599788664 bytes
Database Buffers 226492416 bytes
Redo Buffers 2392064 bytes
Database mounted.
Database opened.
SQL> select open_mode from v$database;
OPEN_MODE
——————–
READ WRITE
SQL> show parameter cluster_database;
NAME TYPE VALUE
———————————— ———– ——————————
cluster_database boolean TRUE
cluster_database_instances integer 2
SQL>
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