Category: Performance Tunning
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Index usage
I have used the Contact table with person schema which is residing in AdventureWorks database for testing the index usage. I am describing the scenarios and places where index seek or scan will be used.
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Index with Included columns
Included column is a new feature in SQL Server 2005. When you add a column as an Included column, it gets stored at the leaf level of the index and it is not part of the index key. This only works for non-clustered indexes.
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Indexes
Indexes are used to speedup data access in the database. By using them one can quickly find the data in a table without having to read all the data from the tables. The index structure resembles an inverse tree similar to a directory structure. This tree begins with the 1st page of an index which…
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Filtered Index – SQL Server 2008
Introduction: Filtered index concept is new feature added from SQL Server 2008. A filtered index is an optimized nonclustered index, especially suited to cover queries that select from a well-defined subset of data. It uses a filter predicate to index a portion of rows in the table.
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Performance Counters
Few of my friends who wish to do a performance tuning in their servers, they asked me what are the counters that they should check that gave me an idea to prepare this document and publish across.