REDO 重做日志文件（redo log files）管理
2016-04-15 09:24
465 查看
1.当前日志相关信息
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 1 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 1 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 1 YES INACTIVE 432636 04-MAR-09
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
2.添加重做日志组
sys@ora11g> alter database add logfile group 4 ('/oracle/u02/oradata/ora11g/redo04_01.log','/oracle/u02/oradata/ora11g/redo04_02.log') size
50m;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 1 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 1 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 1 YES INACTIVE 432636 04-MAR-09
4 1 0 52428800 2 YES UNUSED 0
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
3.添加日志文件
sys@ora11g> alter database add logfile member
'/oracle/u02/oradata/ora11g/redo01_02.log' to group 1,
'/oracle/u02/oradata/ora11g/redo02_02.log' to group 2,
'/oracle/u02/oradata/ora11g/redo03_02.log' to group 3;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 2 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 2 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 2 YES INACTIVE 432636 04-MAR-09
4 1 0 52428800 2 YES UNUSED 0
sys@ora11g> select * from v$logfile order by 1;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
1 INVALID ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 INVALID ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
3 INVALID ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
8 rows selected.
4.重命名日志成员
在重命名日志组成员之前新的目标必须已经存在。Oracle的sql命令只是把控制文件中的内部指针指向新的日志文件。
1）关闭数据库
sys@ora11g> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
2）使用操作系统命令重命名或移动日志文件
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo01.log redo01_01.log
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo02.log redo02_01.log
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo03.log redo03_01.log
3）启动数据库实例到mount状态，重命名控制文件中的日志文件成员。
NotConnected@> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
8 rows selected.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo01.log' to '/oracle/u02/oradata/ora11g/redo01_01.log';
Database altered.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo02.log' to '/oracle/u02/oradata/ora11g/redo02_01.log';
Database altered.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo03.log' to '/oracle/u02/oradata/ora11g/redo03_01.log';
Database altered.
4）open数据库，验证结果
NotConnected@> alter database open;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- -------- ------------- ---------
1 1 18 209715200 2 YES INACTIVE 486960 09-MAR-09
2 1 19 209715200 2 YES INACTIVE 486964 09-MAR-09
3 1 21 209715200 2 NO CURRENT 486973 09-MAR-09
4 1 20 52428800 2 YES INACTIVE 486968 09-MAR-09
sys@ora11g> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
8 rows selected.
5）最后，不要忘记备份控制文件
sys@ora11g> alter database backup controlfile to trace;
Database altered.
5.删除一个非活动的重做日志组的成员
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- -------- ------------- ---------
1 1 18 209715200 2 YES INACTIVE 486960 09-MAR-09
2 1 19 209715200 2 YES INACTIVE 486964 09-MAR-09
3 1 21 209715200 2 NO CURRENT 486973 09-MAR-09
4 1 20 52428800 2 YES INACTIVE 486968 09-MAR-09
sys@ora11g> alter database drop logfile member '/oracle/u02/oradata/ora11g/redo04_02.log';
Database altered.
sys@ora11g> !ls -l /oracle/u02/oradata/ora11g/redo04_02.log
-rw-r----- 1 oracle oinstall 52429312 Mar 9 16:28 /oracle/u02/oradata/ora11g/redo04_02.log
sys@ora11g> !rm -f /oracle/u02/oradata/ora11g/redo04_02.log
sys@ora11g> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
7 rows selected.
6.删除一个非活动的重做日志组
sys@ora11g> alter database drop logfile group 4;
Database altered.
sys@ora11g> !rm -f /oracle/u02/oradata/ora11g/redo04_01.log
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
6 rows selected.
7.强制切换日志
sys@ora11g> alter system switch logfile;
System altered.
sys@ora11g> alter system archive log current;
System altered.
8.小结
1）日志文件非常重要，当多路复用重做日志文件时，应该把一个组的成员保存在不同的磁盘上。
2）在完成日志文件维护后一定要记得备份最新的控制文件！
3）以上试验是在11g环境下完成的，在10g环境中一样适用。
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 1 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 1 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 1 YES INACTIVE 432636 04-MAR-09
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
2.添加重做日志组
sys@ora11g> alter database add logfile group 4 ('/oracle/u02/oradata/ora11g/redo04_01.log','/oracle/u02/oradata/ora11g/redo04_02.log') size
50m;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 1 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 1 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 1 YES INACTIVE 432636 04-MAR-09
4 1 0 52428800 2 YES UNUSED 0
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
3.添加日志文件
sys@ora11g> alter database add logfile member
'/oracle/u02/oradata/ora11g/redo01_02.log' to group 1,
'/oracle/u02/oradata/ora11g/redo02_02.log' to group 2,
'/oracle/u02/oradata/ora11g/redo03_02.log' to group 3;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- --------- ------------- ---------
1 1 10 209715200 2 YES INACTIVE 461938 09-MAR-09
2 1 11 209715200 2 NO CURRENT 485885 09-MAR-09
3 1 9 209715200 2 YES INACTIVE 432636 04-MAR-09
4 1 0 52428800 2 YES UNUSED 0
sys@ora11g> select * from v$logfile order by 1;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ---------------------------------------- ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
1 INVALID ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 INVALID ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
3 INVALID ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
8 rows selected.
4.重命名日志成员
在重命名日志组成员之前新的目标必须已经存在。Oracle的sql命令只是把控制文件中的内部指针指向新的日志文件。
1）关闭数据库
sys@ora11g> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
2）使用操作系统命令重命名或移动日志文件
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo01.log redo01_01.log
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo02.log redo02_01.log
ora11g@RHEL53 /oracle/u02/oradata/ora11g$ mv redo03.log redo03_01.log
3）启动数据库实例到mount状态，重命名控制文件中的日志文件成员。
NotConnected@> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
8 rows selected.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo01.log' to '/oracle/u02/oradata/ora11g/redo01_01.log';
Database altered.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo02.log' to '/oracle/u02/oradata/ora11g/redo02_01.log';
Database altered.
NotConnected@> alter database rename file '/oracle/u02/oradata/ora11g/redo03.log' to '/oracle/u02/oradata/ora11g/redo03_01.log';
Database altered.
4）open数据库，验证结果
NotConnected@> alter database open;
Database altered.
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- -------- ------------- ---------
1 1 18 209715200 2 YES INACTIVE 486960 09-MAR-09
2 1 19 209715200 2 YES INACTIVE 486964 09-MAR-09
3 1 21 209715200 2 NO CURRENT 486973 09-MAR-09
4 1 20 52428800 2 YES INACTIVE 486968 09-MAR-09
sys@ora11g> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_02.log NO
8 rows selected.
5）最后，不要忘记备份控制文件
sys@ora11g> alter database backup controlfile to trace;
Database altered.
5.删除一个非活动的重做日志组的成员
sys@ora11g> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- ---------- ---------- ---------- ---------- --- -------- ------------- ---------
1 1 18 209715200 2 YES INACTIVE 486960 09-MAR-09
2 1 19 209715200 2 YES INACTIVE 486964 09-MAR-09
3 1 21 209715200 2 NO CURRENT 486973 09-MAR-09
4 1 20 52428800 2 YES INACTIVE 486968 09-MAR-09
sys@ora11g> alter database drop logfile member '/oracle/u02/oradata/ora11g/redo04_02.log';
Database altered.
sys@ora11g> !ls -l /oracle/u02/oradata/ora11g/redo04_02.log
-rw-r----- 1 oracle oinstall 52429312 Mar 9 16:28 /oracle/u02/oradata/ora11g/redo04_02.log
sys@ora11g> !rm -f /oracle/u02/oradata/ora11g/redo04_02.log
sys@ora11g> select * from v$logfile order by 1,4;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
4 ONLINE /oracle/u02/oradata/ora11g/redo04_01.log NO
7 rows selected.
6.删除一个非活动的重做日志组
sys@ora11g> alter database drop logfile group 4;
Database altered.
sys@ora11g> !rm -f /oracle/u02/oradata/ora11g/redo04_01.log
sys@ora11g> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- -------------------- ------------------------------------------ ---
1 ONLINE /oracle/u02/oradata/ora11g/redo01_01.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_01.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_01.log NO
1 ONLINE /oracle/u02/oradata/ora11g/redo01_02.log NO
2 ONLINE /oracle/u02/oradata/ora11g/redo02_02.log NO
3 ONLINE /oracle/u02/oradata/ora11g/redo03_02.log NO
6 rows selected.
7.强制切换日志
sys@ora11g> alter system switch logfile;
System altered.
sys@ora11g> alter system archive log current;
System altered.
8.小结
1）日志文件非常重要，当多路复用重做日志文件时，应该把一个组的成员保存在不同的磁盘上。
2）在完成日志文件维护后一定要记得备份最新的控制文件！
3）以上试验是在11g环境下完成的，在10g环境中一样适用。
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- Tomcat调优
- http://www.cnblogs.com/armyfai/p/3985660.html svn教程
- 句柄、引用、指针与对象
- static关键字的用法
- OpenCV特征点检测匹配图像-----添加包围盒
- 欠债2亿，清华辍学少女用13年时间把自己修成了“锦鲤女王”！
- ElasticSearch+Kibana 索引操作
- HDU 1428 漫步校园 (BFS+优先队列+记忆化搜索)
- Python异步通信模块asynchat
- volatile、static、register、extern、auto和const
- Xshell用ssh连接ubuntu掉线解决方法
- android studio使用
- LeetCode *** 334. Increasing Triplet Subsequence
- 数据结构之二分查找（PHP)
- codevs 1501 二叉树最大宽度和高度
- 多线程下的其它组件之CyclicBarrier、Callable、Future、FutureTask
- this关键字的用法
- 基于deep learning的快速图像检索系统
- 从FTP_A地址文件下载并删除后又上传到FTP_B地址
- KM算法 (HDU 2255 1533 1853 3488 3435 2426 2853)