oracle 11g开启归档模式及修改归档目录

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Oracle 11g,开启archive log模式时,默认归档目录为db_recovery_file_dest指定。此参数在pfile/spfile中可以指定:

db_recovery_file_dest='/u01/app/oracle/flash_recovery_area'

更改归档模式

需要在mount状态下,更改归档模式。

sql>shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

sql>startup mount

ORACLE instance started.

--如果安装多个库,会报错,找不到句柄

exit 再用管理员进入

Total System Global Area 1258291200 bytes

Fixed Size 1219160 bytes

Variable Size 318768552 bytes

Database Buffers 922746880 bytes

Redo Buffers 15556608 bytes

Database mounted.

sql>alter database archivelog;

Database altered.

sql>alter database open;

Database altered.

sql>archive log list;

Database log mode Archive Mode

Automatic archival Enabled

Archive destinationUSE_DB_RECOVERY_FILE_DEST

Oldest online log sequence 15

Next log sequence to archive 17

Current log sequence 17

更改log_archive_dest_1参数可更改归档日志目录(pfile/spfile中参数db_recovery_file_dest指定的目录将无效

sql> alter system set log_archive_dest_1='location=/data/oracle/log1/archive_log';最后的目录名称需要为archive_log!

Linux:alter system set log_archive_dest_1='location=/u01/oracle/log/archive_log';

System altered.

sql> archive log list;

Database log modeArchive Mode

Automatic archivalEnabled

Archive destination/data/oracle/log1/archive_log

Oldest online log sequence26

Next log sequence to archive28

Current log sequence28

实际上Oracle 10g开始,可以生成多份一样的日志,保存多个位置,以防不测,方法如下:

sql>alter system set log_archive_dest_2='location=/data/oracle/log2/archive_log';

sql> archive log list;

Database log modeArchive Mode

Automatic archivalEnabled

Archive destination/data/oracle/log2/archive_log只能看到最新设置的归档目录。

Oldest online log sequence30

Next log sequence to archive32

Current log sequence32

sql> alter system archive log current;

更新一下

System altered.

sql>select name from v$archived_log;

NAME

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

/data/oracle/log1/archive_log1_6637_737857592.dbf
/data/oracle/log2/archive_log1_6637_737857592.dbf

2rows selected.

未试 设置为默认值

log_archive_log设置为默认值时,归档目录将会变为?/dbs/arch

sql> alter system set log_archive_dest_1='';

System altered.

sql> alter system set log_archive_dest_2=''

2;;号最后敲入按回车

System altered.

sql> archive log list;

Database log modeArchive Mode

Automatic archivalEnabled

Archive destination?/dbs/arch

Oldest online log sequence33

Next log sequence to archive35

Current log sequence35

sql> shutdown immediate;

重启数据库后,归档目录变回为db_recovery_file_dest指定的目录。

startup mount;

sql> archive log list;

Database log modeArchive Mode

Automatic archivalEnabled

Archive destinationUSE_DB_RECOVERY_FILE_DEST

Oldest online log sequence33

Next log sequence to archive35

Current log sequence35

修改日志文件命名格式:

sql> alter system set log_archive_max_processes = 5;

sql> alter system set log_archive_format = "archive_%t_%s_%r.log" scope=spfile;

*****************************************************************************************************************

sql>archive log list;
如果显示ENABLE则表示已成功归档
sql>select log_mode from v$database;
如果为ARCHIVELOG则表示已成功归档

********************************************************************************

sql> show parameter db_recovery  

  NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /data/oracle/flash_recovery_area
db_recovery_file_dest_size big integer4231m

  可以修改db_recovery_file_dest_size参数的大小

  sql>alter system set db_recovery_file_dest_size=21474836480

Shutdown immediate;

Startup;

完成




以下未测试:


查看oracle数据库是否归档和修改归档模式

http://wenku.baidu.com/view/862b79d1b14e852458fb57fb.html



ORACLE11G
http://wenku.baidu.com/view/9b65e47402768e9951e7386a.html


数据库归档模式管理

http://wenku.baidu.com/view/d46089a1b0717fd5360cdc9a.html**

http://baike.baidu.com/view/3431413.htm


两种方法

1、配置RMAN自动管理ARCHIVELOG。也可在RMAN中将数据备份到磁带上,然后将过期的ARCHIVELOG删除

2、可以手工来处理,步骤如下

1)将/oracle下的相关ARCHIVELOG日志文件移到别的文件系统下(保留一段时间的ARCHIVELOG日志即可,其他的可移走,用系统命令mv移走)。然后打包、压缩,备份到介质上,此时可将这些移出的文件删除。注意:别在原来的/oracle打包了,否则空间占满了就有些麻烦了。

2)以oracle用户登录,执行rman target /。如有多个实例此时执行rman target 用户名/密码@实例名,进入rman

3)在rman中执行

RMAN>list archivelog all; /*列出所有的归档日志文件

RMAN>crosscheck archivelog all; /*与物理归档日志文件保持同步,之前移走了一部分文件,因此执行此命令后会在/oracle目录下找不到的归档日志标记为expired

RMAN>list expired archivelog all; /*列出所有expired(过期)的归档日志文件,此时你就可看到移走的归档日志文件均被标记为expired

RMAN>delete expired archivelog all; /*在oracle中删除所有过期的expired文件

RMAN>list archivelog all; /*再列出所有的归档日志文件,就可发现移走的日志文件被删掉了

RMAN>exit /*退出

http://hi.baidu.com/xyqq163/item/b16e73c32d705f25a0b50a97

oracle数据库归档模式维护管理

一 设置为归档方式

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

01.1 sql> archive log list; #查看是不是归档方式

02.2 sql> alter system set log_archive_start=true scope=spfile; #启用主动归档

03. sql> alter system set log_archive_dest='location=/oracle/ora9/oradata/arch' scope=spfile;

04. #设置归档路径

05. sql> alter system set log_archive_dest_1='location=/oracle/ora9/oradata/arch1' scope=spfile;

06. sql> alter system set log_archive_dest_2='location=/oracle/ora9/oradata/arch2' scope=spfile;

07. #如果归档到两个位置,则可以通过上边方法实现

08. sql> alter system set log_archive_format='arch_%d_%t_%r_%s.log' #设置归档日记款式

09.3 sql> shutdown immediate;

10.4 sql> startup mount; #打开控制文件,不打开数据文件

11.5 sql> alter database archivelog; #将数据库切换为归档模式

12.6 sql> alter database open; #将数据文件打开

13.7 sql> archive log list; #查看此时是否处于归档模式

14.8 查询以确定数据库位于archivelog模式中且归档过程正在运行

15.sql> select log_mode from v$database;

16.sql> select archiver from v$instance;

17.9 日志切换

18.sql> alter system switch logfile;

19.10 这次日志切换将归档写到两个目标地,

20. 1,即第二步的/oracle/ora9/oradata/arch1和/oracle/ora9/oradata/arch1,要是要对目录确认

21.

22.在oracle情况中运行如下查询

23.sql> select name from v$archived_log;

24.而后在操作系统中确认查询所列出的文件

二 设置非归档方式

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

01.1 sql> archive log list; #查看是否是归档方式

02.2 sql> alter system set log_archive_start=false scope=spfile; #禁用自动归档

03.3 sql> shutdown immediate;

04.4 sql> startup mount; #打开控制文件,不打开数据文件

05.5 sql> alter database noarchivelog; #将数据库切换为非归档模式

06.6 sql> alter database open; #将数据文件打开

07.7 sql> archive log list; #查看此时便处于非归档模式

日常维护常用语句:

1.查询每日归档备份大小情况:

SELECT TRUNC(FIRST_TIME) "日期",TRUNC(SUM(BLOCKS*BLOCK_SIZE)/1024/1024/1024,2) "大小(GB/DAY)" FROM V$ARCHIVED_LOG GROUP BY TRUNC(FIRST_TIME) ORDER BY 1 DESC;

2.查看归档空间占用情况:

select NAME,SPACE_LIMIT/1024/1024/1024,SPACE_USED/1024/1024/1024,NUMBER_OF_FILES from V$RECOVERY_FILE_DEST;

#查看大小单位为Gb



http://zhidao.baidu.com/question/149648251.html
1.查询系统使用的是哪一组日志文件:
select * from v$log;

2.查询正在使用的组所对应的日志文件:
select * from v$logfile;

3.强制日志切换:
alter system switch logfile;

4.查询历史日志:
select * from v$log_history;

5.查询日志的归档模式:
select dbid,name,created,log_mode from v$database;

6.查询归档日志的信息:
select recid,stamp,thread#,sequence#,name from v$archived_log;

7.增加删除日志文件组
alter database add logfile group 1 ('/home1/oracle/oradata/ora8i/log1a.log'),'/home2/oracle/oradata/ora8i/log1b.log') size 100M;

alter database drop logfile group 1;

8.增加删除日志成员
alter database add logfile member '/home1/oracle/oradata/ora8i/log1a.log' to group 1,'/home1/oracle/oradata/ora8i/log2a.log' to group 2;

alter database drop logfile member '/home1/oracle/oradata/ora8i/log1a.log' ;

9.日志文件移动
alter database rename file '/home1/oracle/oradata/ora8i/log1a.log' to '/home2/oracle/oradata/ora8i/log1a.log';
执行该命令之前必须保证该日志文件物理上已经移动到新目录

10.清除日志文件
alter database clear logfile '/home1/oracle/oradata/ora8i/log1a.log';
该命令不能用删除组及组成员命令删除日志时使用

http://www.2cto.com/database/201109/104615.html
archive log 日志已满
ORA-00257: archiver error. Connect internal only,until freed 错误的处理方法
1. 用sys用户登录
sqlplus sys/pass@tt as sysdba
2. 看看archiv log所在位置
sql> show parameter log_archive_dest;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest string
log_archive_dest_1 string
log_archive_dest_10 string
3. 一般VALUE为空时,可以用archive log list;检查一下归档目录和log sequence
sql> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 360
Next log sequence to archive 360
Current log sequence 362
4. 检查flash recovery area的使用情况,可以看见archivelog已经很大了,达到96.62
sql> select * from V$FLASH_RECOVERY_AREA_USAGE;
FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
------------ ------------------ ------------------------- ---------------
CONTROLFILE .13 0 1
ONLINELOG 2.93 0 3
ARCHIVELOG 96.62 0 141
BACKUPPIECE 0 0 0
IMAGECOPY 0 0 0
FLASHBACKLOG 0 0 0
5. 计算flash recovery area已经占用的空间
sql> select sum(percent_space_used)*3/100 from v$flash_recovery_area_usage;
SUM(PERCENT_SPACE_USED)*3/100
-----------------------------
2.9904

6. 找到recovery目录,show parameter recover
sql> show parameter recover;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string /u01/app/oracle/flash_recovery_area
db_recovery_file_dest_size big integer 5G
recovery_parallelism integer 0

7 上述结果告诉我们,归档位置用的是默认值,放在flash_recovery_area下(db_recovery_file_dest目录=/u01/app/oracle/flash_recovery_area)
[root@sha3 10.2.0]# echo $ORACLE_BASE
/u01/app/oracle
[root@sha3 10.2.0]# cd $ORACLE_BASE/flash_recovery_area/tt/archivelog
转移或清除对应的归档日志,删除一些不用的日期目录的文件,注意保留最后几个文件(比如360以后的)
---------------------------------------------------------------------------------------
注意:
删除归档日志后,必须用RMAN维护控制文件,否则空间显示仍然不释放。
---------------------------------------------------------------------------------------
8. rman target sys/pass
[root@sha3 oracle]# rman target sys/pass
Recovery Manager: Release 10.2.0.4.0 - Production on Tue Jan 20 01:41:26 2009
Copyright (c) 1982,2007, Oracle . All rights reserved.
connected to target database: tt (DBID=4147983671)

9. 检查一些无用的archivelog
RMAN> crosscheck archivelog all;
10. 删除过期的归档
RMAN> delete expired archivelog all;
delete archivelog until time 'sysdate-1' ; 删除截止到前一天的所有archivelog
11. 再次查询,发现使用率正常,已经降到23.03
sql> select * from V$FLASH_RECOVERY_AREA_USAGE;
FILE_TYPE PERCENT_SPACE_USED PERCENT_SPACE_RECLAIMABLE NUMBER_OF_FILES
------------ ------------------ ------------------------- ---------------
CONTROLFILE .13 0 1
ONLINELOG 2.93 0 3
ARCHIVELOG 23.03 0 36
BACKUPPIECE 0 0 0
IMAGECOPY 0 0 0
FLASHBACKLOG 0 0 0
其它有用的Command:
----------------------------------
如果archive log模式下不能正常startup,则先恢复成noarchive log,startup成功后,再shutdown;
shutdown immediate;
startup mount;
alter database noarchivelog;
alter database open;
shutdown immediate;
再次startup以archive log模式
shutdown immediate;
startup mount;
show parameter log_archive_dest;
alter database archivelog;
archive log list;
alter database open;
如果还不行,则删除一些archlog log
sql> select group#,sequence# from v$log;
GROUP# SEQUENCE#
---------- ----------
1 62
3 64
2 63
原来是日志组一的一个日志不能归档
sql> alter database clear unarchived logfile group 1;
alter database open;
最后,也可以指定位置Arch Log,请按照如下配置
select name from v$datafile;
alter system set log_archive_dest='/opt/app/oracle/oradata/usagedb/arch' scope=spfile
或者修改大小
sql> alter system set db_recovery_file_dest_size=3G scope=both;
原文链接:/oracle/206881.html

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