Home Database Mysql Tutorial SQL Server 压缩日志及数据库文件大小

SQL Server 压缩日志及数据库文件大小

Jun 07, 2016 pm 04:17 PM
server compression size database document log

请按步骤进行,未进行前面的步骤时,请不要做后面的步骤,以免损坏你的数据库. 一般不建议做第4,6两步,第4步不安全,有可能损坏数据库或丢失数据。第6步如果日志达到上限,则以后的数据库处理会失败,在清理日志后才能恢复。 1.清空日志 DUMP TRANSACTION 库名 W

请按步骤进行,未进行前面的步骤时,请不要做后面的步骤,以免损坏你的数据库.

一般不建议做第4,6两步,第4步不安全,有可能损坏数据库或丢失数据。第6步如果日志达到上限,则以后的数据库处理会失败,在清理日志后才能恢复。

1.清空日志

DUMP TRANSACTION 库名 WITH NO_LOG

2.截断事务日志

BACKUP LOG 数据库名 WITH NO_LOG

3.收缩数据库文件(如果不压缩,数据库的文件不会减小

企业管理器--右键你要压缩的数据库--所有任务--收缩数据库--收缩文件

--选择日志文件--在收缩方式里选择收缩至XXM,这里会给出一个允许收缩到的最小M数,直接输入这个数,确定就可以了

--选择数据文件--在收缩方式里选择收缩至XXM,这里会给出一个允许收缩到的最小M数,直接输入这个数,确定就可以了

也可以用SQL语句来完成

--收缩数据库

DBCC SHRINKDATABASE(客户资料)

--收缩指定数据文件,1是文件号,可以通过这个语句查询到:

select * from sysfiles

DBCC SHRINKFILE(1)

4.为了最大化的缩小日志文件(如果是sql 7.0,这步只能在查询分析器中进行)

a.分离数据库:

企业管理器--服务器--数据库--右键--分离数据库

b.在我的电脑中删除LOG文件

c.附加数据库:

企业管理器--服务器--数据库--右键--附加数据库

此法将生成新的LOG,,大小只有500多K

或用代码:

下面的示例分离 pubs,然后将 pubs 中的一个文件附加到当前服务器。

a.分离

EXEC sp_detach_db @dbname = 'pubs'

b.删除日志文件

c.再附加

EXEC sp_attach_single_file_db @dbname = 'pubs',

@physname = 'c:/Program Files/Microsoft

SQL Server/MSSQL/Data/pubs.mdf'

5.为了以后能自动收缩,做如下设置

企业管理器--服务器--右键数据库--属性--选项--选择"自动收缩"

--SQL语句设置方式:

EXEC sp_dboption '数据库名',

'autoshrink', 'TRUE'

6.如果想以后不让它日志增长得太大

企业管理器--服务器--右键数据库--属性--事务日志

--将文件增长限制为xM(x是你允许的最大数据文件大小)

--SQL语句的设置方式:

alter database 数据库名 modify file(name=逻辑文件名,maxsize=20)

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