DBCC DBREINDEX and diskspace

I have a large table that is fragmented and causing poor query
performance. I want to use DBCC DBREINDEX to defragment them. I used
it previously and noticed that I almost ran out of drive space. Then
the files compacted down to a managebale size. The table has grown
again and I fear that it might run out of drive space.
What happens if DBCC DBREINDEX maxes out the drive space. Does it
partially created the index? Does it just not run because it knows it
doesnt have enough space to complete? Or does it just use as much as
it can use without running out of space?
It will fail and the index rebuild will be rolled back. You need 1.2X the
size of the data in your table in free space in order to use DBREINDEX. If
you cannot get more space, consider using DBCC INDEXDEFRAG.
Tom
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinnaclepublishing.com/sql
"dramos" <dan.ramos@.gartner.com> wrote in message
news:641f8b7.0404190802.2e6ca0e1@.posting.google.co m...
I have a large table that is fragmented and causing poor query
performance. I want to use DBCC DBREINDEX to defragment them. I used
it previously and noticed that I almost ran out of drive space. Then
the files compacted down to a managebale size. The table has grown
again and I fear that it might run out of drive space.
What happens if DBCC DBREINDEX maxes out the drive space. Does it
partially created the index? Does it just not run because it knows it
doesnt have enough space to complete? Or does it just use as much as
it can use without running out of space?
|||This helps me out alot:
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
ALTER procedure admin_DBCCDBReindex
as
declare @.Tablename varchar(128),@.db varchar(128),@.exec varchar(256)
set nocount on
set @.db = (select db_name())
declare @.Table table(TableName varchar(128))
insert into @.Table
select so.name
from sysobjects so
where so.name not like 'sys%' and
so.name not like 'dt%' and
so.name not like 'tmp%' and
so.xtype = 'u'
order by so.name
declare mycur cursor for (select TableName from @.Table)
open mycur
fetch next from mycur into @.TableName
while @.@.fetch_status = 0
begin
set @.exec = 'dbcc dbreindex (''' + @.db + '.' + 'dbo.' + @.TableName + ''')'
exec (@.exec)
BACKUP LOG [tmpReindex] TO [tmp]
WITH INIT , NOUNLOAD , NAME = N'tmp log backup', NOSKIP , STATS = 10,
NOFORMAT
fetch next from mycur into @.TableName
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
"dramos" <dan.ramos@.gartner.com> wrote in message
news:641f8b7.0404190802.2e6ca0e1@.posting.google.co m...
> I have a large table that is fragmented and causing poor query
> performance. I want to use DBCC DBREINDEX to defragment them. I used
> it previously and noticed that I almost ran out of drive space. Then
> the files compacted down to a managebale size. The table has grown
> again and I fear that it might run out of drive space.
> What happens if DBCC DBREINDEX maxes out the drive space. Does it
> partially created the index? Does it just not run because it knows it
> doesnt have enough space to complete? Or does it just use as much as
> it can use without running out of space?
|||As Tom suggests, consider DBCC INDEXDEFRAG. There's a whitepaper at
http://www.microsoft.com/technet/pro.../ss2kidbp.mspx
that explains the difference between the two, how to choose between them,
performance comparison etc.
Let us know if you have any more questions after reading the whitepaper.
Regards.
Paul Randal
Dev Lead, Microsoft SQL Server Storage Engine
This posting is provided "AS IS" with no warranties, and confers no rights.
"dramos" <dan.ramos@.gartner.com> wrote in message
news:641f8b7.0404190802.2e6ca0e1@.posting.google.co m...
> I have a large table that is fragmented and causing poor query
> performance. I want to use DBCC DBREINDEX to defragment them. I used
> it previously and noticed that I almost ran out of drive space. Then
> the files compacted down to a managebale size. The table has grown
> again and I fear that it might run out of drive space.
> What happens if DBCC DBREINDEX maxes out the drive space. Does it
> partially created the index? Does it just not run because it knows it
> doesnt have enough space to complete? Or does it just use as much as
> it can use without running out of space?