oracle12c_安装3——部署

数据库安装后需要根据实际情况修改相关参数。

1.生成pfile以防万一。

SQL>  create pfile from spfile;

2.修改内存参数

只要设置MEMORY_MAX_TARGET 和 MEMORY_TARGET 就可以了，SGA_MAX_SIZE 可以设置为0 。

SQL> ALTER SYSTEM SET MEMORY_MAX_TARGET = 1000M SCOPE = SPFILE;  
 
System altered.
 
SQL> ALTER SYSTEM SET MEMORY_TARGET = 1000M SCOPE = SPFILE;
 
System altered.
 
SQL> ALTER SYSTEM SET SGA_TARGET =0 SCOPE = SPFILE; 
 
System altered.
 
SQL> ALTER SYSTEM SET PGA_AGGREGATE_TARGET = 0 SCOPE = SPFILE;
 
System altered.
 
SQL> ALTER SYSTEM SET SGA_MAX_SIZE = 0 SCOPE = SPFILE; 
 
System altered.
 
SQL>

 3.修改密码默认有效期180天

SQL> ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;
 
Profile altered.

4.修改数据文件默认参数：

alter system set db_files=500 scope=spfile;

5.增加相应的redo日志文件

--查看redo信息
select group#,sequence#,status,bytes/1024/1024 from v$log;
 
--添加redo日志文件
alter database add logfile group 4('/home/oracle/data/oracle/oradata/gnss/redo04.log\') size 200M;
alter database add logfile group 5('/home/oracle/data/oracle/oradata/gnss/redo05.log\') size 200M;
alter database add logfile group 6('/data/app/oradata/ORCL/onlinelog/redo06.log') size 200m;

　注意：12c是默认有俩个文件也可以一个，一般一个：必须在cdb下执行。

--切换日志
alter system checkpoint;
alter system switch logfile;
alter system checkpoint;
alter system switch logfile;

--状态当为 INACTIVE 时，可删除日志

alter database drop logfile group 1; 并且手动删除对应的物理文件