Maintinence Jobs vs Defag Jobs

Quick question, I have a maintinence job that optimizes (reorganizes back to
original size my databases back to the original amount of free space). I als
o
have jobs that defrag specific tables.
Will the maintinence job defrag as well as reorgainize.
I would like to get rid of my defrag jobs and have one maintinence job that
does both.Yes. If you select Reorganize data and index pages in the maintenance
plans, it will execute dbcc dbreindex. If you select Remove unused
space from database files, it will execute dbcc shrinkdatabase.
Considerations in going this route is that dbreindex is your only
option in using a maintenance plan. There are different considerations
to take into account when determining whether to use dbreindex or
indexdefrag. You would want to check the following article:
Microsoft SQL Server 2000 Index Defragmentation Best Practices
http://www.microsoft.com/technet/pr...n/ss2kidbp.mspx
A consideration with shrinking is that it is a resource intensive
operation. Additionally, the maintenance plan will limit you to using
shrinkdatabase instead of shrinkfile. You have less control and
somewhat unpredictable individual file sizes when using
shrinkdatabase. If you shrink a database, then it grows back to the
size it was before the shrink and then you shrink it again, the
process can unnecessarily waste a lot of resources as well as
contributing to OS level fragmentation. You can find additional
information in this article:
http://www.karaszi.com/sqlserver/info_dont_shrink.asp
-Sue
On Mon, 25 Oct 2004 09:59:05 -0700, "robert_at_cbb"
<robertatcbb@.discussions.microsoft.com> wrote:

>Quick question, I have a maintinence job that optimizes (reorganizes back t
o
>original size my databases back to the original amount of free space). I al
so
>have jobs that defrag specific tables.
>Will the maintinence job defrag as well as reorgainize.
>I would like to get rid of my defrag jobs and have one maintinence job that
>does both.|||Another consideration is that shrinking introduces logical fragmentation
that dbcc dbreindex removes - if you reindex then shrink you're shooting
yourself in the foot...
You should ask yourself why you have to shrink repeatedly - the reason the
db size grows is that SQL needs the extra space. If the db size grows and
then remains relatively static, you'd do best to leave it alone otherwise
you're wasting resources as Sue says.
Regards.
Paul Randal
Dev Lead, Microsoft SQL Server Storage Engine
This posting is provided "AS IS" with no warranties, and confers no rights.
"Sue Hoegemeier" <Sue_H@.nomail.please> wrote in message
news:knfvn0tq38v3a905ff208i5u134m35top5@.
4ax.com...
> Yes. If you select Reorganize data and index pages in the maintenance
> plans, it will execute dbcc dbreindex. If you select Remove unused
> space from database files, it will execute dbcc shrinkdatabase.
> Considerations in going this route is that dbreindex is your only
> option in using a maintenance plan. There are different considerations
> to take into account when determining whether to use dbreindex or
> indexdefrag. You would want to check the following article:
> Microsoft SQL Server 2000 Index Defragmentation Best Practices
>
http://www.microsoft.com/technet/pr...n/ss2kidbp.mspx
> A consideration with shrinking is that it is a resource intensive
> operation. Additionally, the maintenance plan will limit you to using
> shrinkdatabase instead of shrinkfile. You have less control and
> somewhat unpredictable individual file sizes when using
> shrinkdatabase. If you shrink a database, then it grows back to the
> size it was before the shrink and then you shrink it again, the
> process can unnecessarily waste a lot of resources as well as
> contributing to OS level fragmentation. You can find additional
> information in this article:
> http://www.karaszi.com/sqlserver/info_dont_shrink.asp
> -Sue
> On Mon, 25 Oct 2004 09:59:05 -0700, "robert_at_cbb"
> <robertatcbb@.discussions.microsoft.com> wrote:
>
to[vbcol=seagreen]
also[vbcol=seagreen]
that[vbcol=seagreen]
>