Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Compressing a database
Message
 
 
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Autre
Versions des environnements
SQL Server:
SQL Server 2008
Application:
Web
Divers
Thread ID:
01382992
Message ID:
01383305
Vues:
52
Hi David,

It still was an interesting read, wasn't? :) I wanted to reply immediately that the space would be re-used, but decided to double-check myself and started googling on the topic.

>Naomi,
>
>FWIW none of these referenced articles actually address Michel's question about data page reuse.
>
>
>Michel - yes SQL server will reuse space on the data and index pages as it sees fit. Over time though page fragmentation does happen to tables that have high insert activity, and definately on tables with high delete activity. So periodically you should drop all the indexes on a table, drop it's primary key constraint, then rebuild the primary key constraint and then rebuild the indexes.
>
>
>dbcc showcontig( 'TheTable' ) WITH tableresults, ALL_INDEXES
>
>
>will display the primary key/index fragmentation for a table. The most relevant columns are BestCount and ActualCount. If you see an index that's consuming twice as many pages as it could it's time for a rebuild of the index.
>
>SQL server has tools for routinely maintaining indexes but they don't do as good a job as a complete drop/recreate process does.
>
>Look at
>
>
>DBCC INDEXDEFRAG
>DBCC DBREINDEX
>
>>>If I add 1000 records in a table and remove all of them. Does SQL Server keep that empty space or will it recycle it? By that, I mean, once in a while, is there any reason to do a database compress?
>>
>>One more link on this topic
>>
>>http://www.joehavelick.com/post/2008/02/27/Deleting-Records-and-Recovering-Space-in-SQL-Database.aspx
If it's not broken, fix it until it is.


My Blog
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform