解析怎样缩小SQLServer数据库日志

2019-06-19 22:14:39 来源: 阿里信息港

  问:我的数据库实际大小为600MB, 日志文件实际大小为33MB, 但日志文件占用空间为2.8GB!我曾经试了几种方式,SHIRNK DATABASE, TRUNCATE LOG FILE, 都没办法将文件缩小。

  答:你可以把下面的代码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。

  -----SET NOCOUNT ONDECLARE @LogicalFileName sysname, @MaxMinutes INT, @NewSize INTUSE 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 / initializeDECLARE @OriginalSize intSELECT @OriginalSize = size FROM sysfiles WHERE name = @LogicalFileNameSELECT '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 = @LogicalFileNameCREATE 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 ILE @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 = @LogicalFileNameDROP TABLE DummyTransSET NOCOUNT OFF

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