Anatoly Lubarsky Logo
programming, design, integration, games, music

MSSQL Dynamic Management Views (DMVs) for indexes

SQLCAT Blog posts on SQL Server 2005 Dynamic Management Views (DMVs):


"Since indexes provide an alternative to a table scan, and because DMVs expose index usage counters, we can compare the cost vs. the benefit of indexes. This comparison will include the maintenance cost of keeping the index up to date, versus the benefit of reads e.g. when an index can be used in lieu of a table scan. Keep in mind that an update or delete operation involves both a read which is first required to determine whether a row qualifies for the update operation, and a write if a row is found to qualify. In an insert operation, only writes will be performed on all indexes. Consequently, in an insert-intensive workload, writes will exceed reads. In an update-intensive (updates and deletes) workload, read and write counts are generally close assuming there are not a lot of records not found. In read-intensive workloads, read counts will exceed write counts. Referential constraints such as foreign keys require other read activity (for inserts, updates, and deletes) to ensure referential integrity is maintained."


Enjoy


Related Posts:

Friday, December 30, 2005 3:55 PM

Login

Subscribe via RSS

Article Categories

.Net Framework
ASP.NET Tips
C# Win32 API
HTML, CSS, Web
Javascript Tips
MSSQL Tips
System
System.Net
WebServices

Archives

(02) January, 2018
(01) June, 2013
(03) March, 2013
(02) February, 2013
(01) July, 2012
(01) April, 2012
(01) September, 2011
(01) August, 2011
(03) May, 2011
(01) December, 2010
(01) November, 2010
(01) October, 2010
(01) June, 2010
(01) May, 2010
(02) March, 2010
(01) January, 2010
(02) December, 2009
(03) September, 2009
(03) August, 2009
(09) July, 2009
(04) June, 2009
(03) May, 2009
(02) April, 2009
(03) March, 2009
(02) February, 2009
(02) January, 2009
(04) December, 2008
(04) November, 2008
(05) October, 2008
(04) September, 2008
(05) August, 2008
(04) July, 2008
(05) June, 2008
(07) May, 2008
(04) April, 2008
(03) March, 2008
(02) February, 2008
(03) January, 2008
(03) December, 2007
(05) November, 2007
(04) October, 2007
(05) September, 2007
(12) August, 2007
(11) July, 2007
(14) June, 2007
(13) May, 2007
(13) April, 2007
(10) March, 2007
(11) February, 2007
(14) January, 2007
(14) December, 2006
(12) November, 2006
(08) October, 2006
(09) September, 2006
(06) August, 2006
(08) July, 2006
(10) June, 2006
(09) May, 2006
(22) April, 2006
(25) March, 2006
(12) February, 2006
(14) January, 2006
(19) December, 2005
(17) November, 2005
(16) October, 2005
(16) September, 2005
(12) August, 2005
(14) July, 2005
(09) June, 2005
(12) May, 2005
(12) April, 2005
(20) March, 2005
(11) February, 2005
(12) January, 2005
(18) December, 2004
(13) November, 2004
(12) October, 2004
(14) September, 2004
(09) August, 2004
(23) July, 2004
(19) June, 2004
(29) May, 2004
(19) April, 2004
(16) March, 2004
(09) February, 2004
(06) January, 2004
(02) December, 2003
(01) November, 2003

Post Categories

.Net and C#
Android
Antispam
App. Development
Architecture
ASP.NET
Blogging
Deprecated Projects
Facebook Platform
Fun
Google
iOS
Javascript
Misc.
MSSQL
Music
My Games
Performance
Roller
Social Networks
Tools
Visual Studio
Web 2.0
WebServices

About Me

linkedin Profile
Recs
Who am I

My Sites

Billy Beet
x2line blogs