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

Monitoring performance of a query by SET STATISTICS XML


SET STATISTICS XML is an XML version of the actual execution plan. It provides all the information in XML format which we used to get in graphical format in the actual execution plan.

Getting ready

We are going to use the SELECT query given in the previous recipe's How to do it... section by replacing SHOWPLAN_XML with SET STATISTICS XML. The main intention to use the same query from the previous recipe Monitoring performance of query by SET SHOWPLAN_XML is to see the difference between two execution plan. Generally, if an index and statistics' histogram is updated, then the execution plan on sampling (estimated execution plan) and execution plan on real table (actual execution plan) remain the same. If you find any difference between these two plans, then it is a time to investigate that.

How to do it...

Perform the following steps to use SET STATISTICS XML:

  1. Write down the following query in SSMS from Start |All Programs | SQL Server...