Book Image

Microsoft SQL Server 2012 Performance Tuning Cookbook

Book Image

Microsoft SQL Server 2012 Performance Tuning Cookbook

Overview of this book

As a DBA you must have encountered a slow running application on SQL Server, but there are various factors that could be affecting the performance. If you find yourself in this situation, don't wait, pick up this book and start working towards improving performance of your SQL Server 2012. SQL Server 2012 Performance Tuning Cookbook is divided into three major parts -- Performance Monitoring, Performance Tuning, and Performance Management--that are mandatory to deal with performance in any capacity. SQL Server 2012 Performance Tuning Cookbook offers a great way to manage performance with effective, concise, and practical recipes. You will learn how to diagnose performance issues, fix them, and take precaution to avoid common mistakes. Each recipe given in this book is an individual task that will address different performance aspects to take your SQL Server's Performance to a higher level.The first part of this book covers Monitoring with SQL Server Profiler, DTA, System statistical function, SPs with DBCC commands, Resource Monitor & Reliability, and Performance Monitor and Execution Plan. The second part of the book offers Execution Plan, Dynamic Management Views, and Dynamic Management Functions, SQL Server Cache and Stored Procedure Recompilations, Indexes, Important ways to write effective TSQL, Statistics, Table and Index Partitioning, Advanced Query tuning with Query Hints and Plan Guide, Dealing with Locking, Blocking and Deadlocking and Configuring SQL Server for optimization to boost performance.The third and final part gives you knowledge of performance management with help of Policy Based Management and Management with Resource Governor.
Table of Contents (28 chapters)
Microsoft SQL Server 2012 Performance Tuning Cookbook
Credits
About the Authors
Acknowledgement
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Configuring memory in 32 bit versus. 64 bit


I have observed quite a few times that in SQL Server 2005/2008, DBAs tend to use the AWE Enabled option to limit memory. However, from SQL Server 2012 onwards, this option has been deprecated so we cannot use more memory than what the virtual address space limits in 32-bit instances of SQL Server. If you have more memory for this instance of SQL Server, you have to migrate to a 64-bit instance of SQL Server. Here is the memory limit given by Microsoft:

SQL Server and operating system settings

Maximum amount of memory used by SQL Server

32-bit SQL Server on 32-bit OS

2 GB

32-bit SQL Server on 32-bit OS with /3G boot option

3 GB

32-bit SQL Server on 64-bit OS

4 GB

Though the AWE Enabled option is deprecated in SQL Server 2012, it would be helpful to understand its usage in the previous version to understand other memory-related options. Address Windowing Extensions (AWE) allows 32-bit operating systems to access large amounts of memory...