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标题: 如何缩小SQL SERVER日志文件 [打印本页]

作者: 有梦好甜蜜    时间: 2009-2-7 10:44
标题: 如何缩小SQL SERVER日志文件
  前几天也碰到日志文件过大的问题,数据库实际大小为600M, 日志文件实际大小为33M, 但日志文件占用空间为2.8G!!!   试了多种方式,SHIRNK DATABASE, TRUNCATE LOG FILE, 都没办法将文件缩小。无论如何,这应该算SQL SERVER的一个BUG吧。      后来找到下面的代码,就可以将日志文件缩小到自己想要的大小了。把代码COPY到查询分析器里,,然后修改其中的3个参数(数据库名,日志文件名,和目标日志文件的大小),运行即可(我已经用过多次了)   -----   SET NOCOUNT ON   DECLARE @LogicalFileName sysname,   @MaxMinutes INT,   @NewSize INT         USE Marias -- 要操作的数据库名   SELECT @LogicalFileName = 'Marias_log', -- 日志文件名   @MaxMinutes = 10, -- Limit on time allowed to wrap log.   @NewSize = 100 -- 你想设定的日志文件的大小(M)      -- Setup / initialize   DECLARE @OriginalSize int   SELECT @OriginalSize = size   FROM sysfiles   WHERE name = @LogicalFileName   SELECT 'Original Size of ' db_name() ' LOG is '   CONVERT(VARCHAR(30),@OriginalSize) ' 8K pages or '   CONVERT(VARCHAR(30),(@OriginalSize*8/1024)) 'MB'   FROM sysfiles   WHERE name = @LogicalFileName   CREATE TABLE DummyTrans   (DummyColumn char (8000) not null)         DECLARE @Counter INT,   @StartTime DATETIME,   @TruncLog VARCHAR(255)   SELECT @StartTime = GETDATE(),   @TruncLog = 'BACKUP LOG ' db_name() ' WITH TRUNCATE_ONLY'      DBCC SHRINKFILE (@LogicalFileName, @NewSize)   EXEC (@TruncLog)   -- Wrap the log if necessary.   WHILE @MaxMinutes > DATEDIFF (mi, @StartTime, GETDATE()) -- time has not expired   AND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName)   AND (@OriginalSize * 8 /1024) > @NewSize   BEGIN -- Outer loop.   SELECT @Counter = 0   WHILE ((@Counter < @OriginalSize / 16) AND (@Counter < 50000))   BEGIN -- update   INSERT DummyTrans VALUES ('Fill Log')   DELETE DummyTrans   SELECT @Counter = @Counter 1   END   EXEC (@TruncLog)   END   SELECT 'Final Size of ' db_name() ' LOG is '   CONVERT(VARCHAR(30),size) ' 8K pages or '   CONVERT(VARCHAR(30),(size*8/1024)) 'MB'   FROM sysfiles   WHERE name = @LogicalFileName   DROP TABLE DummyTrans   SET NOCOUNT OFF    <




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