Category Archives for "Expert"

Nov 02

Rx for Demystifying Index Tuning Decisions – Part 2

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Development , SQL Server

Review In Part 1 of this blog series the author discussed various aspects of SQL Server indices such as: Types of indices and their variations, e.g., clustered, nonclustered, filtered, and covering Physical versus logical index access methods, e.g., seeks, scans, key/RID lookups, singleton lookups, and range scans Why index tuning should begin with queries Determining […]

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Nov 02

Rx for Demystifying Index Tuning Decisions – Part 2

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Development , SQL Server

Review In Part 1 of this blog series the author discussed various aspects of SQL Server indices such as: Types of indices and their variations, e.g., clustered, nonclustered, filtered, and covering Physical versus logical index access methods, e.g., seeks, scans, key/RID lookups, singleton lookups, and range scans Why index tuning should begin with queries Determining […]

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Oct 26

Rx for Demystifying Index Tuning Decisions – Part 1

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Administration , SQL Development , SQL Server

Overview Indices are one of the most troubling and mysterious areas for DBAs and developers. Most understand that adding a badly needed index can yield dramatic query performance improvements, but how does one know what is needed? Many believe more indices are better, regardless of the number. Most fear deleting ANY existing indices, even when […]

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Oct 26

Rx for Demystifying Index Tuning Decisions – Part 1

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Administration , SQL Development , SQL Server

Overview Indices are one of the most troubling and mysterious areas for DBAs and developers. Most understand that adding a badly needed index can yield dramatic query performance improvements, but how does one know what is needed? Many believe more indices are better, regardless of the number. Most fear deleting ANY existing indices, even when […]

Continue reading
Jul 20

Handling Multiple Missing Index Recommendations for the Same Table

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Development , SQL Server

The Problem Many articles concerning SQL Server missing index recommendations demonstrate the mechanics for obtaining them and often highlight whether the suggested key columns are used in equality or inequality relationships. Most of these examples emphasize a single index that can be implemented to improve performance. However, real-life situations often involve multiple or many suggested […]

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Jul 20

Handling Multiple Missing Index Recommendations for the Same Table

By Jeffry Schwartz | Expert , Missing Indexes , Performance Tuning , Query Tuning , SQL Development , SQL Server

The Problem Many articles concerning SQL Server missing index recommendations demonstrate the mechanics for obtaining them and often highlight whether the suggested key columns are used in equality or inequality relationships. Most of these examples emphasize a single index that can be implemented to improve performance. However, real-life situations often involve multiple or many suggested […]

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