把下面的代码粘贴到SQL Query Analyzer(查询分析器)里执行即可(注意修改红色部分的3个参数): SET NOCOUNT ON DECLARE @LogicalFileName sysname, @MaxMinutes INT, @NewSize INT USE Dicky --需要缩小日志的数据库名 SELECT @LogicalFileName = ''''Dicky_Log'''', --日志文件的逻辑名,非物理文件名 @MaxMinutes = 10, -- Limit on time allowed to wrap log. @NewSize = 2 --需要重新设定的日志文件的大小(单位:M),此值必须小于原先文件大小
-- 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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