Titlebook: SQL Server 2012 Query Performance Tuning; Grant Fritchey Book 2012Latest edition Grant Fritchey and Sajal Dam 2012

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SQL Query Performance Tuning,L Server-especially to the optimizer, which helps determine how a query is executed, and the query engine, which executes the query-lead to better performance all on their own. Many systems are moving into the cloud where certain aspects of the systems are managed for you. Despite all this, query pe

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System Performance Analysis, of the first things you should do when starting the performance tuning process, since without a baseline you will not be able to quantify improvements. In this chapter, you will learn how to use the Performance Monitor tool to accomplish this and how to use the different performance counters that a

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Index Analysis,he wrong column, or columns, can be the basis for all performance problems starting with basic data access, continuing through joins, and ending in filtering clauses. For these reasons, it is extremely important for everyone—not just the DBA—to understand the different indexing techniques that can b

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Database Engine Tuning Advisor,isting indexes may not be entirely appropriate, and new indexes may be required. The task of deciding upon the correct indexes is complicated by the fact that an index change that benefits one set of queries may be detrimental to another set of queries.

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Lookup Analysis,ith nonclustered indexes is the cost of excessive lookups, formerly known as ., which are a mechanism to navigate from a nonclustered index row to the corresponding data row in the clustered index or the heap. Therefore, it makes sense to look at the cause of lookups and to evaluate how to avoid thi

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Fragmentation Analysis,clustered) on a table, the cost of data retrieval is reduced by properly ordering the leaf pages of the index and the rows within the leaf pages. In an OLTP database, data changes continually, causing fragmentation of the indexes. As a result, the number of reads required to return the same number o

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