Home Database Mysql Tutorial Oracle数据库归档日志大小的修改方法

Oracle数据库归档日志大小的修改方法

Jun 07, 2016 pm 05:08 PM

Oracle归档日志相信大家都不会陌生,下面就为您介绍Oracle归档日志大小的修改方法,希望对您学习Oracle归档日志方面能够有所帮助

Oracle归档日志相信大家都不会陌生,,下面就为您介绍Oracle归档日志大小的修改方法,希望对您学习Oracle归档日志方面能够有所帮助。

方法:加入新的大的日志文件,然后删掉旧的小的日志文件

假设现有三个日志组,每个组内有一个成员,每个成员的大小为1MB,现在想把此三个日志组的成员大小都改为10MB

1、创建2个新的日志组

以下是代码片段:
alter database add logfile group 4 ('D:\ORACLE\ORADATA\ORADB\REDO04_1.LOG') size 1024k;
alter database add logfile group 5 ('D:\ORACLE\ORADATA\ORADB\REDO05_1.LOG') size 1024k;

2、切换当前日志到新的日志组

以下是代码片段:
alter system switch logfile; alter system switch logfile;

3、删除旧的日志组

以下是代码片段:
alter database drop logfile group 1; alter database drop logfile group 2; alter database drop logfile group 3;

4、操作系统下删除原日志组1、2、3中的文件

5、重建日志组1、2、3

以下是代码片段:
alter database add logfile group 1 ('D:\ORACLE\ORADATA\ORADB\REDO01_1.LOG') size 10M;
alter database add logfile group 2 ('D:\ORACLE\ORADATA\ORADB\REDO02_1.LOG') size 10M;
alter database add logfile group 3 ('D:\ORACLE\ORADATA\ORADB\REDO03_1.LOG') size 10M;

6、切换日志组

以下是代码片段:
alter system switch logfile; alter system switch logfile; alter system switch logfile;

7、删除中间过渡用的日志组4、5

以下是代码片段:
alter database drop logfile group 4; alter database drop logfile group 5;

8、到操作系统下删除原日志组4、5中的文件

9、备份当前的最新的控制文件

以下是代码片段:
SQL> connect internal SQL> alter database backup controlfile to trace resetlogs

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