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SQL SERVER 2008 R2 UNLEASHED PDF

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Microsoft SQL Server R2 Unleashed managed, secured, and delivered to a variety of formats, including HTML, Excel, PDF, TIFF. CHAPTER 1 SQL Server R2 Editions and Enhancements. 3. SQL Server R2 .. SQL Server R2 Reporting Services Thierry D'Hers, Group Pro- contributing writer on Microsoft Exchange Server Unleashed, Micro-. To download these free pdf ebooks it may redirect you to the original website where you can find the download link. 1. Microsoft SQL Server R2 Unleashed.


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Table 5. This book can help solutions providers to use SQL Server Reporting Services to deliver business intelligence services to customers, learn about new features in SQL Server R2, manage report data sources and models and more. Setup issues a warning, but allows you to proceed, if the CPU speed or minimum memory requirement is not met. We recommend installing Reporting Services on Windows Although Windows SP2 is a fully supported platform, Windows reflects the latest technological advances, including enhanced coverage in the areas of security and high availability.

Table 5. This book can help solutions providers to use SQL Server Reporting Services to deliver business intelligence services to customers, learn about new features in SQL Server R2, manage report data sources and models and more. Setup issues a warning, but allows you to proceed, if the CPU speed or minimum memory requirement is not met. We recommend installing Reporting Services on Windows Although Windows SP2 is a fully supported platform, Windows reflects the latest technological advances, including enhanced coverage in the areas of security and high availability.

Windows Server also provides the Hyper-V virtualization systems. Tables 5. For example, Reporting Services bit is not supported on Windows bit Itanium. downloading hardware for SLQ Server. downloading hardware for virtual hosts running SQL Server.

Note that with any bit operating system, management tools may be supported in WOW WOW64 allows native bit code to execute natively on nonbit systems. For IA64 deployments, use development tools installed on a separate bit or x64 workstation. Michael Lisin has more than 12 years experience in the software industry with expertise in SQL Server and. NET technologies.

Pdf unleashed r2 server sql 2008

Printed with permission from Sams Publishing. Copyright For more information about this title and other similar books, please visit Sams Publishing. Please check the box if you want to proceed.

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Microsoft SQL Server R2 Unleashed - PDF Free Download

The exchange operator is responsible for providing process manage- ment, data redistribution, and flow control. The exchange operators are displayed in the Download from www.

Pdf unleashed r2 server sql 2008

One or more of these operators can appear in the execution plan output of a query plan for a parallel query. Whereas a parallel query execution plan can use more than one thread, a serial execution plan, used by a nonparallel query, uses only a single thread for its execution.

Prior to query execution time, SQL Server determines whether the current system state and config- uration allow for parallel query execution. If parallel query execution is justified, SQL Server determines the optimal number of threads, called the degree of parallelism, and distributes the query workload execution across those threads.

The parallel query uses the same number of threads until the query completes. SQL Server reexamines the optimal degree of parallelism each time a query execution plan is retrieved from the procedure cache.

Individual instances of the same query could be assigned a different degree of parallelism. SQL Server calculates the degree of parallelism for each instance of a parallel query execu- tion by using the following criteria: If two or more processors are allocated to SQL Server, it can use parallel queries.

What is the number of concurrent active users? Is sufficient memory available for parallel query execution? Queries, like other processes, require resources to execute, particularly memory. Obviously, a parallel query demands more memory than a serial query.

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More impor- tantly, as the degree of parallelism increases, so does the amount of memory required. The Query Optimizer carefully considers this in developing a query execu- tion plan. The Query Optimizer could either adjust the degree of parallelism or use a serial plan to complete the query. What is the type of query being executed? Queries that use several CPU cycles justify using a parallel execution plan.

Some examples are joins of large tables, substantial aggregations, and sorting of large result sets. The Query Optimizer determines whether to use a parallel or serial plan by checking the value of the cost threshold for parallelism. Are a sufficient number of rows processed in the given stream? If the Query Optimizer determines that the number of rows in a stream is too low, it does not execute a parallel plan.

This prevents scenarios where the parallel execution costs exceed the benefits of executing a parallel plan.

Regardless of the answers to the previous questions, the Query Optimizer does not use a parallel execution plan for a query if any one of the following conditions is true: The serial execution cost of the query is not high enough to consider an alternative parallel execution plan.

A serial execution plan exists that is estimated to be faster than any possible parallel execution plan for the particular query.

Microsoft SQL Server 2008 R2 Unleashed [PDF] Full Ebook

The query contains scalar or relational operators that cannot be run in parallel. Parallel Query Configuration Options Two server configuration options—maximum degree of parallelism and cost thresh- old for parallelism—affect the consideration for a parallel query. Although doing so is not recommended, you can change the default settings for each. For single processor machines, these settings are ignored.

The maximum degree of parallelism option limits the number of threads to use in a parallel plan execution.

Unleashed 2008 pdf server r2 sql

The range of possible values is 0 to If you want to suppress parallel processing completely, set the value to 1. If the calculated value to execute a serial plan is greater than the value set for the cost threshold for parallelism, a parallel plan is generated.

This value is defined by the estimated time, in seconds, to execute the serial plan.

Microsoft SQL Server 2008 R2 Unleashed

The range of values for this setting is 0 to The default value is 5. If the maximum degree of parallelism is set to 1, or if the computer has a single processor, the cost threshold for parallelism value is ignored.

In the Server Properties dialog, select the Advanced page. The parallelism options are near the bottom, as shown in Figure Identifying Parallel Queries You can identify when a parallel execution plan is being chosen by displaying the graphi- cal execution plan in SSMS. The graphical execution plan uses icons to represent the execution of specific statements and queries in SQL Server.

The execution plan output for every parallel query has at least one of these three logical operators: Distribute Streams—Receives a single input stream of records and distributes multiple output streams.