SQL Server无法收缩日志文件的原因分析及解决办法

数据库  /  管理员 发布于 5年前   197

最近服务器执行收缩日志文件大小的job老是报错

我所用的一个批量收缩日志脚本

USE [master]GO/****** Object: StoredProcedure [dbo].[ShrinkUser_DATABASESLogFile] Script Date: 01/05/2016 09:52:39 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOALTER PROC [dbo].[ShrinkUser_DATABASESLogFile]ASBEGIN DECLARE @DBNAME NVARCHAR(MAX)DECLARE @SQL NVARCHAR(MAX)--临时表保存数据CREATE TABLE #DataBaseServerData( ID INT IDENTITY(1, 1) , DBNAME NVARCHAR(MAX) , Log_Total_MB DECIMAL(18, 1) NOT NULL , Log_FREE_SPACE_MB DECIMAL(18, 1) NOT NULL )--游标DECLARE @itemCur CURSORSET @itemCur = CURSOR FOR SELECT name from SYS.[databases] WHERE [name] NOT IN ('MASTER','MODEL','TEMPDB','MSDB','ReportServer','ReportServerTempDB','distribution')and state=0OPEN @itemCurFETCH NEXT FROM @itemCur INTO @DBNAMEWHILE @@FETCH_STATUS = 0 BEGIN SET @SQL=N'USE ['+@DBNAME+'];'+CHAR(10) +'  DECLARE @TotalLogSpace DECIMAL(18, 1)  DECLARE @FreeLogSpace DECIMAL(18, 1)  DECLARE @filename NVARCHAR(MAX)  DECLARE @CanshrinkSize BIGINT  DECLARE @SQL1 nvarchar(MAX)SELECT @TotalLogSpace=(SUM(CONVERT(dec(17, 2), sysfiles.size)) / 128)   FROM dbo.sysfiles AS sysfiles WHERE [groupid]=0SELECT @FreeLogSpace = ( SUM(( size - FILEPROPERTY(name, ''SpaceUsed'') )) )/ 128.0  FROM sys.database_files  WHERE [type] = 1SELECT @filename=name FROM sys.database_files WHERE [type]=1SET @CanshrinkSize=CAST((@TotalLogSpace-@FreeLogSpace) AS BIGINT) SET @SQL1 = ''USE ['+@DBNAME+']''SET @SQL1 = @SQL1+ ''DBCC SHRINKFILE (['' + @filename + ''],'' + CAST(@CanshrinkSize+1 AS NVARCHAR(MAX)) + '')'' EXEC (@SQL1)' EXEC (@SQL)  FETCH NEXT FROM @itemCur INTO @DBNAME END CLOSE @itemCurDEALLOCATE @itemCurSELECT * FROM [#DataBaseServerData]DROP TABLE [#DataBaseServerData]END 

幸亏报错信息还是很全面，根据报错信息找到相关的数据库，执行一下DBCC LOGINFO

dbcc loginfo(N'cdb')

发现确实只有两个VLF文件，不能再收缩了，因为是批量脚本，当其中有一个库失败之后，后续的库就不会再进行收缩操作

这里只要加上数据库的VLF数量的判断就可以了

本文写的不好，还请各位大侠提出宝贵意见，如有好的解决方案欢迎分享，大家共同学习进步。