Oracle归档日志删除
我们都都知道在controlfile中记录着每一个archivelog的相关信息，当然们在OS下把这些物理文件delete掉后，在我们的controlfile中
我们都都知道在controlfile中记录着每一个archivelog的相关信息，当然们在OS下把这些物理文件delete掉后，在我们的controlfile中仍然记录着这些archivelog的信息，在Oracle的OEM管理器中有可视化的日志展现出，当我们手工清除archive目录下的文件后，这些记录并没有被我们从controlfile中清除掉，也就是oracle并不知道这些文件已经不存在了!这时候我们要做手工的清除的话，，下面我经过实验，可以尝试这种方法：
1. 进入rman
2. connect target /
3. crosscheck archivelog all;
4. delete expired archivelog all;
这时候我们再去OEM中看就一定看不到，如果你的从来没有做过这个动作的话，我们可以比较从这个动作前的controlfile后动作后的controlfile的大小!
ORACLE正确删除归档并回收空间的方法
ORACLE正确删除归档并回收空间的方法
一个ORACLE归档日志经常满，表现为/oraarchive 这个文件空间占用100％大家一定抱怨ORACLE为何没有归档维护工具，很多人直接删除了事，错了，ORACLE有，而且很智能，可以正确的删除归档和FLASHBACK，不过切记,ORACLE归档日志对于ORACLE的数据恢复和备份非常重要，不到万不得已不要删除归档日志。
删除归档日志的过程
以ORACLE用户身份登录到数据库服务器主机或通过网络连接
进入ORACLE数据备份工具
rman target/
或rman target/@orcl
在命令窗口里面执行
DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-7';
说明
SYSDATA-7，表明当前的系统时间7天前，before关键字表示在7天前的归档日志，如果使用了闪回功能，也会删除闪回的数据。
同样道理，也可以删除从7天前到现在的全部日志，不过这个命令要考虑清楚，做完这个删除，最好马上进行全备份数据库
DELETE ARCHIVELOG FROM TIME 'SYSDATE-7';
UNIX/LINUX下也可以通过FIND找到7天前的归档数据，使用EXEC子操作删除
find /oraarchive -xdev -mtime +7 -name "*.dbf" -exec rm -f {} ;
这样做仍然会在RMAN里留下未管理的归档文件
仍需要在RMAN里执行下面2条命令
crosscheck archivelog all;
delete expired archivelog all;
所以还不如上面的方法好用，不过用FIND的好处就是，可以在条件上，和EXEC子项上做很多操作，实现更复杂的功能
3.简要介绍一下report obsolete命令
使用report obsolete命令报告过期备份
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Backup Set 125 01-NOV-04
Backup Piece 125 01-NOV-04 /data1/oracle/orabak/full_1_541045804
Backup Set 131 04-NOV-04
Backup Piece 131 04-NOV-04 /data1/oracle/orabak/full_AVATAR2_20041104_131
....
Backup Set 173 06-DEC-04
Backup Piece 173 06-DEC-04 /data1/oracle/orabak/full_AVATAR2_20041206_173
Backup Set 179 11-DEC-04
Backup Piece 179 11-DEC-04 /data1/oracle/orabak/arch544588206.arc
.....
Backup Piece 189 17-DEC-04 /data1/oracle/orabak/arch545106606.arc
Backup Set 190 17-DEC-04
Backup Piece 190 17-DEC-04 /data1/oracle/orabak/arch545106665.arc
Backup Set 191 20-DEC-04
Backup Piece 191 20-DEC-04 /data1/oracle/orabak/arch_AVATAR2_20041220_194
Archive Log 2973 20-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2985.dbf
Archive Log 2971 20-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2984.dbf
.....
Archive Log 2705 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2717.dbf
Archive Log 2704 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2716.dbf
Archive Log 2703 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2715.dbf
Archive Log 2702 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2714.dbf
4.使用delete obsolete命令删除过期备份:
RMAN> delete obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
using channel ORA_DISK_1
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Backup Set 125 01-NOV-04
Backup Piece 125 01-NOV-04 /data1/oracle/orabak/full_1_541045804
....
Archive Log 2704 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2716.dbf
Archive Log 2703 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2715.dbf
Archive Log 2702 17-DEC-04 /opt/oracle/oradata/avatar2/archive/1_2714.dbf
Do you really want to delete the above objects (enter YES or NO)? yes
deleted backup piece
backup piece handle=/data1/oracle/orabak/full_AVATAR2_20041206_173 recid=173 stamp=544156241
.....
deleted archive log
archive log filename=/opt/oracle/oradata/avatar2/archive/1_2715.dbf recid=2703 stamp=545108268
deleted archive log
archive log filename=/opt/oracle/oradata/avatar2/archive/1_2714.dbf recid=2702 stamp=545107659
Deleted 286 objects
RMAN> crosscheck archivelog all;
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=19 devtype=DISK
specification does not match any archive log in the recovery catalog
5 在rman中用crosscheck检查归档日志,2个归档日志都是失败的:
RMAN> crosscheck archivelog all;
释放的通道: ORA_DISK_1
分配的通道: ORA_DISK_1
通道 ORA_DISK_1: sid=14 devtype=DISK
对归档日志的验证失败
存档日志文件名 =D:ORACLEORADATATESTARCHIVE1_47.DBF 记录 ID=1 时间戳 =572866
683
对归档日志的验证失败
存档日志文件名 =D:ORACLEORADATATESTARCHIVE11_48.DBF 记录 ID=2 时间戳 =57286
6931
已交叉检验的 2 对象
6 试着同步一下,看行不行,结果不行,crosscheck还是失败:
RMAN> resync catalog;
正在启动全部恢复目录的 resync
完成全部 resync
RMAN> crosscheck archivelog all;
释放的通道: ORA_DISK_1
分配的通道: ORA_DISK_1
通道 ORA_DISK_1: sid=14 devtype=DISK
对归档日志的验证失败
存档日志文件名 =D:ORACLEORADATATESTARCHIVE1_47.DBF 记录 ID=1 时间戳 =572866
683
对归档日志的验证失败
存档日志文件名 =D:ORACLEORADATATESTARCHIVE11_48.DBF 记录 ID=2 时间戳 =57286
6931
已交叉检验的 2 对象
7 用list expired看看是否有失效的archive log,证明没有失效的archive log:
RMAN> list expired archivelog all;
说明与恢复目录中的任何存档日志均不匹配
8 更改语言环境试试,结果再次crosscheck,2个archive log 都成功了:
RMAN> exit
恢复管理器完成。
C:>set nls_lang=american_america.zhs16gbk
C:>rman catalogrman/rman@safetarget /
Recovery Manager: Release 9.2.0.1.0 - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
connected to target database: TEST (DBID=1870953724)
connected to recovery catalog database
RMAN> crosscheck archivelog all;
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=9 devtype=DISK
validation succeeded for archived log
archive log filename=D:ORACLEORADATATESTARCHIVE1_47.DBF recid=1 stamp=57286
6683
validation succeeded for archived log
archive log filename=D:ORACLEORADATATESTARCHIVE11_48.DBF recid=2 stamp=5728
66931
Crosschecked 2 objects
本文永久更新链接地址：
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How does Go language implement the addition, deletion, modification and query operations of the database?
Mar 27, 2024 pm 09:39 PM
Go language is an efficient, concise and easy-to-learn programming language. It is favored by developers because of its advantages in concurrent programming and network programming. In actual development, database operations are an indispensable part. This article will introduce how to use Go language to implement database addition, deletion, modification and query operations. In Go language, we usually use third-party libraries to operate databases, such as commonly used sql packages, gorm, etc. Here we take the sql package as an example to introduce how to implement the addition, deletion, modification and query operations of the database. Assume we are using a MySQL database.
iOS 18 adds a new 'Recovered' album function to retrieve lost or damaged photos
Jul 18, 2024 am 05:48 AM
Apple's latest releases of iOS18, iPadOS18 and macOS Sequoia systems have added an important feature to the Photos application, designed to help users easily recover photos and videos lost or damaged due to various reasons. The new feature introduces an album called "Recovered" in the Tools section of the Photos app that will automatically appear when a user has pictures or videos on their device that are not part of their photo library. The emergence of the "Recovered" album provides a solution for photos and videos lost due to database corruption, the camera application not saving to the photo library correctly, or a third-party application managing the photo library. Users only need a few simple steps
How does Hibernate implement polymorphic mapping?
Apr 17, 2024 pm 12:09 PM
Hibernate polymorphic mapping can map inherited classes to the database and provides the following mapping types: joined-subclass: Create a separate table for the subclass, including all columns of the parent class. table-per-class: Create a separate table for subclasses, containing only subclass-specific columns. union-subclass: similar to joined-subclass, but the parent class table unions all subclass columns.
Detailed tutorial on establishing a database connection using MySQLi in PHP
Jun 04, 2024 pm 01:42 PM
How to use MySQLi to establish a database connection in PHP: Include MySQLi extension (require_once) Create connection function (functionconnect_to_db) Call connection function ($conn=connect_to_db()) Execute query ($result=$conn->query()) Close connection ( $conn->close())
How to handle database connection errors in PHP
Jun 05, 2024 pm 02:16 PM
To handle database connection errors in PHP, you can use the following steps: Use mysqli_connect_errno() to obtain the error code. Use mysqli_connect_error() to get the error message. By capturing and logging these error messages, database connection issues can be easily identified and resolved, ensuring the smooth running of your application.
An in-depth analysis of how HTML reads the database
Apr 09, 2024 pm 12:36 PM
HTML cannot read the database directly, but it can be achieved through JavaScript and AJAX. The steps include establishing a database connection, sending a query, processing the response, and updating the page. This article provides a practical example of using JavaScript, AJAX and PHP to read data from a MySQL database, showing how to dynamically display query results in an HTML page. This example uses XMLHttpRequest to establish a database connection, send a query and process the response, thereby filling data into page elements and realizing the function of HTML reading the database.
Tips and practices for handling Chinese garbled characters in databases with PHP
Mar 27, 2024 pm 05:21 PM
PHP is a back-end programming language widely used in website development. It has powerful database operation functions and is often used to interact with databases such as MySQL. However, due to the complexity of Chinese character encoding, problems often arise when dealing with Chinese garbled characters in the database. This article will introduce the skills and practices of PHP in handling Chinese garbled characters in databases, including common causes of garbled characters, solutions and specific code examples. Common reasons for garbled characters are incorrect database character set settings: the correct character set needs to be selected when creating the database, such as utf8 or u
How to connect to remote database using Golang?
Jun 01, 2024 pm 08:31 PM
Through the Go standard library database/sql package, you can connect to remote databases such as MySQL, PostgreSQL or SQLite: create a connection string containing database connection information. Use the sql.Open() function to open a database connection. Perform database operations such as SQL queries and insert operations. Use defer to close the database connection to release resources.
