SQL Server 2008 Query Performance Tuning Distilled by Sajal Dam, Grant Fritchey PDF

By Sajal Dam, Grant Fritchey

ISBN-10: 1430219025

ISBN-13: 9781430219026

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For example, in a server with more than 4GB of memory, an improper memory configuration will prevent SQL Server from using the memory beyond 4GB. Furthermore, if the capacity of a particular resource is small, then it can soon become a performance bottleneck for SQL Server. Chapter 2 covers these hardware bottlenecks in detail. You should also look at the configuration of SQL Server, since proper configuration is essential for an optimized application. There is a long list of SQL Server configurations that define the generic behavior of a SQL Server installation.

Performance Baseline One of the main objectives of performance analysis is to understand the underlying level of system use or pressure on different hardware and software subsystems. This knowledge helps you in the following ways: • Allows you to analyze resource bottlenecks. • Enables you to troubleshoot by comparing system utilization patterns with a preestablished baseline. • Assists you in making accurate estimates in capacity planning and scheduling hardware upgrades. • Aids you in identifying low-utilization periods when the database administrative activities can be executed.

You can confirm a low memory requirement from SQL Server by the presence of a large number of free pages, usually 5,000 or more. Memory Bottleneck Resolutions When there is high stress on memory, indicated by a large number of hard page faults, you can resolve memory bottleneck using the flowchart shown in Figure 2-5. Com 27 28 Ch apt er 2 ■ S YS TE M PER FOR MA NC E A NA LY S I S Figure 2-5. Memory bottleneck resolution chart A few of the common resolutions for memory bottlenecks are as follows: • Optimizing application workload • Allocating more memory to SQL Server • Increasing system memory • Changing from a 32-bit to a 64-bit processor • Enabling 3GB of process space • Using memory beyond 4GB within 32-bit SQL Server Let’s take a look at each of theseDownload in turn.

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SQL Server 2008 Query Performance Tuning Distilled by Sajal Dam, Grant Fritchey


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