Question

大家好我曾写过一个收缩数据库的脚本

DECLARE @string     NVARCHAR(4000), 
        @Strt       INT ,
        @END        INT ,
        @DBName     NVARCHAR(255),
        @Log_Size   DECIMAL(18,5),
        @Log_Name   NVARCHAR(25),
        @String_sql NVARCHAR(MAX)

CREATE TABLE #t (srno INT IDENTITY(1,1),filename NVARCHAR(255),DBNAME NVARCHAR(50))  
CREATE TABLE #Tmp_logfile (fileName NVARCHAR(25),file_size DECIMAL(12,5),log_Name NVARCHAR(25))
INSERT INTO #Tmp_logfile (fileName,file_size,log_Name)

SELECT a.NAME , CONVERT(DECIMAL(12,5),ROUND(b.size/128.000,5)),b.name 
FROM SYS.DATABASES  a 
INNER JOIN  SYS.MASTER_FILES b ON a.database_id=b.database_id
WHERE a.database_id > 4 AND b.file_id =2 

INSERT INTO #t
SELECT 
'USE [' + d.name + N']' + CHAR(13) + CHAR(10) 
+ 'DBCC SHRINKFILE (N''' + mf.name + N''' , 1, TRUNCATEONLY) ' 
+ CHAR(13) + CHAR(10) + CHAR(13) + CHAR(10) as fileName,d.name
FROM sys.master_files mf 
JOIN sys.databases d 
ON mf.database_id = d.database_id 
WHERE d.database_id > 4 AND mf.file_id=2;

SET @Strt=1
SELECT @END= Max(Srno)FROM #t

While @Strt<=@END
BEGIN
    SELECT  @string= FileName,@DBName= DBNAME FROM #t WHERE srno= @Strt
    SELECT  @Log_Size= file_size FROM #Tmp_logfile WHERE fileName=  @DBName

    IF @Log_Size > 10000 BEGIN   -- Limit The Log Size After which Log file to be Shrink

    PRINT (@string)
    EXECUTE (@string)
END
SET @Strt=@Strt+1

END       ---- SHRINKING Log File END Here

这里举例说明我已经把日志文件大于10 GB的条件收缩了数据库日志文件。

但问题是有时它在Sql Agent中运行时失败并不知道我犯了什么错误。任何帮助都会被感激。

Answer 1

为缩小数据库创建了一个proc。它不检查日志大小。它将日志百分比检查为60.当前写为静态。

运行顺利。可以作为你的过程的替代。

 Create Proc ShrinkDatabase
 As
Begin
Declare @DBName nvarchar(100),@sQuery nvarchar(max)
Declare @LogFileName nvarchar(100)=''

Create table #tblTemp (id int identity(1,1),DatabaseName nvarchar(100),LogSize decimal(10,2),LogPercent decimal(10,2), IsHandled int)

Insert into #tblTemp (DatabaseName,LogSize,LogPercent,IsHandled) 
Exec ('DBCC SQLPERF(logspace)');

Update #tblTemp Set IsHandled=0;

Delete from #tblTemp WHERE DatabaseName IN 
('master','model','msdb','tempdb','ReportServer$MSSQLSERVER14','ReportServer$MSSQLSERVER14TempDB',
'ReportServer$SQLEXPRESS','ReportServer$SQLEXPRESSTempDB','ReportServer','ReportServerTempDB');

While (Select count(*) from #tblTemp Where LogPercent > 60 and IsHandled=0) > 0
Begin
    Select Top 1 @DBName=DatabaseName from #tblTemp Where LogPercent > 60 And IsHandled=0

    Set @sQuery=' USE ' + @DbName + '; '
    Exec (@sQuery)

    SELECT @LogFileName=name FROM sys.master_files 
    WHERE database_id = (Select database_id from sys.databases Where name=@DbName) AND type = 1;

    Set @sQuery=@sQuery + ' ALTER DATABASE '+@DBName+'  SET RECOVERY SIMPLE;  '
    Set @sQuery=@sQuery + ' DBCC SHRINKFILE ('+@LogFileName+') WITH NO_INFOMSGS ; '
    Set @sQuery=@sQuery + ' ALTER DATABASE '+@DBName+'  SET RECOVERY FULL;'

    --Print (@sQuery)
    Exec (@sQuery)

    Print 'Shrunk Database: ' + @DBName

    Update #tblTemp Set IsHandled=1 Where DatabaseName=@DbName And LogPercent > 60 And IsHandled=0
End
 Drop table #tblTemp
End
Go

收缩数据库失败

1 个答案: