DBCC DBREINDEX - Update or Create Statistics

Hello All,
I have a 12-15 GB database that is performing poorly when we try to apply
database schema changes using our java application. The schema changes
include adding new columns to several tables that have seveal million rows ,
dropping and recreating several constraints, and changing some of the indexes
from unique to regular indexes, etc.
Are changes to the database schema a logged operation? If yes, how about
changing the database from Full recovery to Simple recovery mode before
applying schema changes? Will this help the performance?
I'am thinking of running DBCC DBREINDEX. Is DBCC DBREINDEX a logged
operation? If yes, how much free disk space do we need for both the data file
and the transaction log file? Do I need to run Update or Create Statistics
after a DBCC DBREINDEX operation?
Thank you so much,
MitraMitra,
Schema changes are logged. Switching to SIMPLE recovery mode may help the
performance. DBCC DBREINDEX is logged. Space required will vary depending
on the number of records and indexes. Statistics are updated as part of a
DBCC DBREINDEX operation. For more information see the following:
http://www.microsoft.com/technet/prodtechnol/sql/2000/maintain/ss2kidbp.mspx
HTH
Jerry
"mitra" <mitra@.discussions.microsoft.com> wrote in message
news:037B09E8-D868-49FC-8C0A-1922807B3B64@.microsoft.com...
> Hello All,
> I have a 12-15 GB database that is performing poorly when we try to apply
> database schema changes using our java application. The schema changes
> include adding new columns to several tables that have seveal million rows
> ,
> dropping and recreating several constraints, and changing some of the
> indexes
> from unique to regular indexes, etc.
> Are changes to the database schema a logged operation? If yes, how about
> changing the database from Full recovery to Simple recovery mode before
> applying schema changes? Will this help the performance?
> I'am thinking of running DBCC DBREINDEX. Is DBCC DBREINDEX a logged
> operation? If yes, how much free disk space do we need for both the data
> file
> and the transaction log file? Do I need to run Update or Create Statistics
> after a DBCC DBREINDEX operation?
> Thank you so much,
> Mitra