记录一则clear重做日志文件的案例
1.官方文档描述
关于Clearing a Redo Log File的官方文档描述：
> A redo log file might become corrupted while the database is open, and ultimately stop database activity because archiving cannot continue. In this situation the ALTER DATABASE CLEAR LOGFILE statement can be used to reinitialize the file without shutting down the database.
>
> The following statement clears the log files in redo log group number 3:
>
> ALTER DATABASE CLEAR LOGFILE GROUP 3;
> This statement overcomes two situations where dropping redo logs is not possible:
>
> If there are only two log groups
>
> The corrupt redo log file belongs to the current group
>
> If the corrupt redo log file has not been archived, use the UNARCHIVED keyword in the statement.
>
> ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3;
> This statement clears the corrupted redo logs and avoids archiving them. The cleared redo logs are available for use even though they were not archived.
>
> If you clear a log file that is needed for recovery of a backup, then you can no longer recover from that backup. The database writes a message in the alert log describing the backups from which you cannot recover.
Note:
If you clear an unarchived redo log file, you should make another backup of the database.
To clear an unarchived redo log that is needed to bring an offline tablespace online, use the UNRECOVERABLE DATAFILE clause in the ALTER DATABASE CLEAR LOGFILE statement.If you clear a redo log needed to bring an offline tablespace online, you will not be able to bring the tablespace online again. You will have to drop the tablespace or perform an incomplete recovery. Note that tablespaces taken offline normal do not require recovery.
2.故障报错信息
启动数据库在open阶段失败：
SQL> startup
ORACLE instance started.
Total System Global Area 313860096 bytes
Fixed Size 1344652 bytes
Variable Size 205523828 bytes
Database Buffers 100663296 bytes
Redo Buffers 6328320 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
Process ID: 2039
Session ID: 102 Serial number: 5
进一步查看alert告警日志发现是redo日志文件损坏：
Mon May 20 01:00:52 2019
alter database open
Mon May 20 01:00:52 2019
LGWR: STARTING ARCH PROCESSES
Mon May 20 01:00:53 2019
ARC0 started with pid=18, OS id=2389
ARC0: Archival started
LGWR: STARTING ARCH PROCESSES COMPLETE
ARC0: STARTING ARCH PROCESSES
Mon May 20 01:00:54 2019
ARC1 started with pid=19, OS id=2391
Mon May 20 01:00:54 2019
ARC2 started with pid=20, OS id=2393
Incomplete read from log member '/u03/oradata/PROD2/redo01.dbf'. Trying next member.
ARCH: All Archive destinations made inactive due to error 333
ARCH: Closing local archive destination LOG_ARCHIVE_DEST_1: '/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_1_1008712962.dbf' (error 333) (PROD2)
Committing creation of archivelog '/u01/app/oracle/product/11.2.0/db_1/dbs/arch1_1_1008712962.dbf' (error 333)
Mon May 20 01:00:54 2019
ARC3 started with pid=21, OS id=2395
Errors in file /u01/app/oracle/diag/rdbms/prod2/PROD2/trace/PROD2_ora_2179.trc:
ORA-16038: log 1 sequence# 1 cannot be archived
ORA-00333: redo log read error block count
ORA-00312: online log 1 thread 1: '/u03/oradata/PROD2/redo01.dbf'
ARC1: Archival started
ARC2: Archival started
USER (ospid: 2179): terminating the instance due to error 16038
Mon May 20 01:00:55 2019
System state dump requested by (instance=1, osid=2179), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/prod2/PROD2/trace/PROD2_diag_2131.trc
Dumping diagnostic data in directory=[cdmp_20190520010055], requested by (instance=1, osid=2179), summary=[abnormal instance termination].
Instance terminated by USER, pid = 2179
3.分析解决问题
**3.1 再次尝试启动数据库故障可重现**
SQL> startup mount;
SQL> select checkpoint_change# from v$datafile;
CHECKPOINT_CHANGE#
------------------
2126114
2126114
2126114
2126114
2126114
SQL> select checkpoint_change# from v$datafile_header;
CHECKPOINT_CHANGE#
------------------
2126114
2126114
2126114
2126114
2126114
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 2179
Session ID: 102 Serial number: 5
3.2 启动到mount尝试clear重做日志文件
SQL> conn /as sysdba
Connected to an idle instance.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 313860096 bytes
Fixed Size 1344652 bytes
Variable Size 205523828 bytes
Database Buffers 100663296 bytes
Redo Buffers 6328320 bytes
Database mounted.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------
1 1 1 52428800 512 1 NO INACTIVE 2080429 19-MAY-19 2105566 20-MAY-19
3 1 3 52428800 512 1 NO CURRENT 2106113 20-MAY-19 2.8147E+14
2 1 2 52428800 512 1 NO INACTIVE 2105566 20-MAY-19 2106113 20-MAY-19
SQL> alter database clear logfile group 1;
alter database clear logfile group 1
*
ERROR at line 1:
ORA-00350: log 1 of instance PROD2 (thread 1) needs to be archived
ORA-00312: online log 1 thread 1: '/u03/oradata/PROD2/redo01.dbf'
SQL> alter database clear unarchived logfile group 1;
Database altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------
1 1 0 52428800 512 1 YES UNUSED 2080429 19-MAY-19 2105566 20-MAY-19
3 1 3 52428800 512 1 NO CURRENT 2106113 20-MAY-19 2.8147E+14
2 1 2 52428800 512 1 NO INACTIVE 2105566 20-MAY-19 2106113 20-MAY-19
由于本次3个redo日志全部确认已损坏，需要依次clear:
SQL> alter database clear logfile group 2;
alter database clear logfile group 2
*
ERROR at line 1:
ORA-00350: log 2 of instance PROD2 (thread 1) needs to be archived
ORA-00312: online log 2 thread 1: '/u03/oradata/PROD2/redo02.dbf'
SQL> alter database clear logfile group 3;
alter database clear logfile group 3
*
ERROR at line 1:
ORA-00350: log 3 of instance PROD2 (thread 1) needs to be archived
ORA-00312: online log 3 thread 1: '/u03/oradata/PROD2/redo03.dbf'
SQL> alter database clear unarchived logfile group 2;
Database altered.
SQL> alter database clear unarchived logfile group 3;
Database altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------
1 1 4 52428800 512 1 NO CURRENT 2106114 20-MAY-19 2.8147E+14
3 1 0 52428800 512 1 YES UNUSED 2106113 20-MAY-19 2106114 20-MAY-19
2 1 0 52428800 512 1 YES UNUSED 2105566 20-MAY-19 2106113 20-MAY-19
SQL> alter database open;
Database altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME
---------- ---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- --------- ------------ ---------
1 1 4 52428800 512 1 NO CURRENT 2106114 20-MAY-19 2.8147E+14
2 1 0 52428800 512 1 YES UNUSED 2105566 20-MAY-19 2106113 20-MAY-19
3 1 0 52428800 512 1 YES UNUSED 2106113 20-MAY-19 2106114 20-MAY-19
数据库开启后建议尽快重新执行一次全备。
记录一则clear重做日志文件的案例的更多相关文章
- Oracle重做日志文件
一.联机重做日志的规划管理 1.联机重做日志 记录了数据的所有变化(DML,DDL或管理员对数据所作的结构性更改等) 提供恢复机制(对于意外删除或宕机利用日志文件实现数据恢复) 可以被分组管理 11 ...
- Oracle 联机重做日志文件(ONLINE LOG FILE)
--========================================= -- Oracle 联机重做日志文件(ONLINE LOG FILE) --================== ...
- 初识oracle重做日志文件
转自 http://blog.csdn.net/indexman/article/details/7746948 以下易容翻译自oracle dba官方文档,不足之处还望指出. 管理重做日志文件 学习 ...
- oracle redo 重做日志文件
以下易容翻译自oracle dba官方文档,不足之处还望指出. 管理重做日志文件 学习目标:1.解释重做日志文件的目的2.描述重做日志文件的结构3.学会控制日志切换与检查点4.多元化管理重做日志文件5 ...
- ORACLE 移动数据文件 控制文件 重做日志文件
ORACLE数据库有时候需要对存储进行调整,增加分区.IO调优等等,此时需要移动数据文件.重做日志文件.控制文件等等,下文结合例子总结一下这方面的知识点. 进行数据文件.重做日志文件.控制文件的迁移前 ...
- MySQL 重做日志文件
一.innodb log的基础知识 · innodb log顾名思义:即innodb存储引擎产生的日志,也可以称为重做日志文件,默认在innodb_data_home_dir下面有两个文件ib_log ...
- InnoDB存储引擎的表空间文件,重做日志文件
存储引擎文件:因为MySQL表存储引擎的关系,每个存储引擎都会有自己的文件来保存各种数据.这些存储引擎真正存储了数据和索引等数据. 表空间文件 InnoDB存储引擎在存储设计上模仿了Oracle,将存 ...
- (Les16 执行数据库恢复)-重做日志文件恢复
丢失重做日志文件 丢失了重做日志文件组中的某个成员,并且组中至少还有一个成员: -不会影响实例的正常操作. -预警日志中会收到一条信息, ...
- ORACLE - 管理重做日志文件
ORACLE重做日志文件用于在数据库崩溃等情况下用于恢复数据,默认情况下为三个文件redo01.log/redo02.log/redo03.log,文件组循环使用,在录入与更新操作比较多的应用中,日志 ...
随机推荐
- Feign挡板和Mock
背景: 在项目开发中,会有调用第三方接口的场景.当开发时,对方不愿意提供测试服务器给我们调用,或者有的接口会按调用次数进行计费.当联调时,第三方的测试服务器也可能会出现不稳定,如果他们的服务挂了,我们 ...
- [virtualenvwrapper] 命令小结
创建环境 mkvirtualenv env1 mkvirtualenv env2 环境创建之后,会自动进入该目录,并激活该环境. 切换环境 workon env1 workon env2 列出已有环境 ...
- Java秒杀系统实战系列~构建SpringBoot多模块项目
摘要:本篇博文是“Java秒杀系统实战系列文章”的第二篇,主要分享介绍如何采用IDEA,基于SpringBoot+SpringMVC+Mybatis+分布式中间件构建一个多模块的项目,即“秒杀系统”! ...
- 【Arduino】66种传感器系列实验（1）---干簧管传感器模块
37款传感器与模块的提法,在网络上广泛流传,其实Arduino能够兼容的传感器模块肯定是不止37种的.鉴于本人手头积累了一些传感器和各种模块,依照实践(动手试试)出真知的理念,以学习和交流为目的,这里 ...
- docker跨主机通信扁平化网络的设计与实现
端口映射.ovs. fannel,weave 1.使用网桥实现跨主机容器连接 使用Open vSwitch实现跨主机容器连接
- Linux/UNIX编程：使用C语言实现简单的 ls 命令
刚好把 Linux/UNIX 编程中的文件和IO部分学完了,就想编写个 ls 命令练习一下,本以为很简单,调用个 stat 就完事了,没想到前前后后弄了七八个小时,90%的时间都用在格式化(像 ls ...
- Codeforces Round #479 (Div. 3) D. Divide by three, multiply by two
传送门 D. Divide by three, multiply by two •题意 给你一个数 x,有以下两种操作,x 可以任选其中一种操作得到数 y 1.如果x可以被3整除,y=x/3 2.y= ...
- LinkedList实现类
List还有一个LinkedList的实现,它是一个基于链表实现的List类,对于顺序访问集合中的元素进行了优化,特别是当插入.删除元素时速度非常快.因为LinkedList即实现了List接口,也实 ...
- rabbitMQ_Publish/Subscribe(三)
发布/订阅 生产者发布信息,多个订阅者可以同时接收到信息. 转发器 现在是时候在RabbitMQ中引入完整的消息传递模式了. 让我们快速了解我们在以前的教程中介绍的内容: 生产者是一个发送消息的应用程 ...
- Oracle DBLink跨数据库访问SQL server数据同步 踩坑实录
项目需求:这里暂且叫A公司吧,A公司有一套人事管理软件,需要与我们公司的软件做人员信息同步,A公司用的是SQL server数据库,我们公司用的Oracle,接口都不会开发(一万句"fuck ...