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  • 修改Oracle redo.log文件的大小

    1.查看当前日志组成员:

    SQL> select member from v$logfile;

    MEMBER

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

    C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO01.LOG

    C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO02.LOG

    C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO03.LOG

    2.查看当前日志组状态:

    SQL> select group#,members,bytes/1024/1024,status from v$log;

    GROUP# MEMBERS BYTES/1024/1024 STATUS

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

    1 1 50 INACTIVE

    2 1 50 INACTIVE

    3 1 50 CURRENT

    现有三个日志组,每个组内有一个成员,每个成员的大小为50MB,现在想把此三个日志组的成员大小都改为100MB ,步骤如下:

    1、创建2个新的日志组

    SQL> alter database add logfile group 4 ('C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO04.LOG') size 100M;

    SQL> alter database add logfile group 5 ('C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO05.LOG') size 100M;

    2、切换当前日志到新的日志组

    SQL> alter system switch logfile;

    SQL> alter system switch logfile;

    SQL> select group#,members,bytes/1024/1024,status from v$log;

    GROUP# MEMBERS BYTES/1024/1024 STATUS

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

    1 1 50 ACTIVE

    2 1 50 ACTIVE

    3 1 50 ACTIVE

    4 1 100 CURRENT

    5 1 100 ACTIVE

    3、删除旧的日志组

    SQL> alter database drop logfile group 1;

    SQL> alter database drop logfile group 2;

    SQL> 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REDO01.LOG、REDO02.LOG、REDO03.LOG。

    5、重建日志组1、2、3

    SQL> alter database add logfile group 1 ('C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO01.LOG') size 100M;

    SQL> alter database add logfile group 2 ('C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO02.LOG') size 100M;

    SQL> alter database add logfile group 3 ('C:ORACLEPRODUCT10.2.0ORADATAFYDBREDO03.LOG') size 100M;

    6、切换日志组

    SQL> alter system switch logfile;

    SQL> alter system switch logfile;

    7、删除中间过渡用的日志组4、5

    SQL> alter database drop logfile group 4;

    SQL> alter database drop logfile group 5;

    SQL> select group#,status from v$log;

    GROUP# STATUS

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

    1 UNUSED

    2 UNUSED

    3 UNUSED

    4 INACTIVE

    5 CURRENT

    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

    SQL> conn / as sysdba

    SQL> alter database backup controlfile to trace resetlogs;

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  • 原文地址:https://www.cnblogs.com/itzhangxp/p/3723609.html
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