收縮日誌檔案的指令碼

@newsize =100

-- 你想設定的日誌檔案的大小(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) notnull)

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 = (selectsize

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

endexec (@trunclog)

endselect

' 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