The Definitive Guide to SQL Server Performance Optimization

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Table of ContentsIntroduction...................................................................................................................................... iBy Sean Daily, Series Editor ................................................................................... iForeword......................................................................................................................................... iiChapter 1: Introduction to SQL Server Performance ......................................................................1Defining Performance and Health ...................................................................................................1How SQL Server Works ..................................................................................................................2The Transaction Log............................................................................................................2Indexes .................................................................................................................................4Clustered Indexes.....................................................................................................4Nonclustered Indexes...............................................................................................5The Query Engine and Optimizer........................................................................................6Caches..................................................................................................................................8Understanding Hardware Performance Components.......................................................................9Disk I/O................................................................................................................................9Network I/O .......................................................................................................................10Processors ..........................................................................................................................11Memory..............................................................................................................................12SQL Server Performance Audit Methodology ..............................................................................13Performance Tools.............................................................................................................13What to Measure................................................................................................................14Documenting Your Measurements ....................................................................................15Types of Databases ........................................................................................................................16OLTP Databases ................................................................................................................16Data Warehouses ...............................................................................................................18Scaling Concepts............................................................................................................................18Holistic Performance .....................................................................................................................19Server Hardware ................................................................................................................20Software Settings ...............................................................................................................21Design Issues .....................................................................................................................22Client Considerations.........................................................................................................23Summary........................................................................................................................................24Chapter 2: Measuring Performance ...............................................................................................25System (Performance) Monitor......................................................................................................25iii
Table of ContentsSQL Server Performance Objects......................................................................................25Using System Monitor .......................................................................................................27Benefits of System Monitor...............................................................................................29Query Analyzer..............................................................................................................................30Using Query Analyzer .......................................................................................................30Benefits of Query Analyzer ...............................................................................................33SQL Profiler...................................................................................................................................34SQL Profiler Events...........................................................................................................34Using SQL Profiler ............................................................................................................40Benefits of SQL Profiler ....................................................................................................41Third-Party Performance Analysis Tools ......................................................................................41Precise Indepth for SQL Server .........................................................................................41NetIQ AppManager for SQL Server..................................................................................42Intrinsic Design Coefficient...............................................................................................43Lumigent Log Explorer......................................................................................................43When to Measure Performance......................................................................................................43Trending and Trend Analysis.........................................................................................................44Summary........................................................................................................................................49Chapter 3: Performance Tuning Methodology ..............................................................................50The Purpose of Trending: A Quick Review ......................................................................51System Monitor’s Log View..............................................................................................51Selecting Performance Objects..........................................................................................54Storing the Log Data..........................................................................................................55Analyzing the Data ............................................................................................................56Lather, Rinse, Repeat!........................................................................................................60Identifying Bottlenecks..................................................................................................................60Hardware Bottlenecks........................................................................................................61Processor Performance...........................................................................................61Memory Performance ............................................................................................62Disk Performance...................................................................................................63Network Performance ............................................................................................65Software Bottlenecks .........................................................................................................66Database Bottlenecks.........................................................................................................67iv
Page 1 and 2: tmrealtimepublishers.comtmThe Defin
Page 3: ForewordForewordI’ve been tuning
Page 7 and 8: Table of ContentsPartitioned and Fe
Page 9 and 10: Copyright StatementCopyright Statem
Page 11 and 12: Chapter 1might create health ranges
Page 13 and 14: Chapter 1IndexesIndexes play a key
Page 15 and 16: Chapter 1 SQL Server has to perform
Page 17 and 18: Chapter 1 I’ll show you how to up
Page 19 and 20: Chapter 1better. The same applies t
Page 21 and 22: Chapter 1In addition to disk I/O, p
Page 23 and 24: Chapter 1System Monitor is great fo
Page 25 and 26: Chapter 1Figure 1.4: Representing p
Page 27 and 28: Chapter 1Data WarehousesA data ware
Page 29 and 30: Chapter 1Thus, you can’t focus on
Page 31 and 32: Chapter 1You might find that certai
Page 33 and 34: Chapter 1SummaryIn this chapter, I
Page 35 and 36: Chapter 2• SQLServer:Buffer Parti
Page 37 and 38: Chapter 2Figure 2.1: You can add as
Page 39 and 40: Chapter 2statements are causing the
Page 41 and 42: Chapter 2Each step in the execution
Page 43: Chapter 2Figure 2.5: The Index Tuni
Page 46 and 47: Chapter 2• Server—This category
Page 48 and 49: Chapter 2• ObjectName—This colu
Page 50 and 51: Chapter 2new trace based upon a tra
Page 52 and 53: Chapter 2is essentially a plug-in m
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Chapter 2giving you plenty of room
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Chapter 2Figure 2.11: Continuing to
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Chapter 2Figure 2.12: Plotting tren
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Chapter 3Tools such as Predictor ca
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Chapter 3time. I like to have Syste
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Chapter 3• Memory• Network Segm
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Chapter 3want to analyze trends for
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Chapter 33. I tend to stick with th
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Chapter 3Hardware BottlenecksHardwa
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Chapter 3The reason is that Windows
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Chapter 3work with sequential data
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Chapter 3connections, servicing a l
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Chapter 3• If your network is alr
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Chapter 4• The average length of
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Chapter 4The optimizer will compile
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Chapter 4• Index seek—This type
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Chapter 4The following list provide
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Chapter 4• Complex queries might
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Chapter 4Figure 4.3: A well- (and p
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Chapter 4Using the Index Tuning Wiz
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Chapter 4Figure 4.6: Selecting the
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Chapter 4Figure 4.8: Revised execut
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Chapter 5Chapter 5: Understanding C
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Chapter 5• Distribute streams—T
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Chapter 5• Merge join—This phys
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Chapter 5• Update—This operator
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Chapter 5 Try it yourself! You can
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Chapter 5Nested Loop JoinsThese joi
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Chapter 5You can force SQL Server t
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Chapter 5• The view must be creat
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Chapter 5 Watch stored procedure pe
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Chapter 5I like to start with the S
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Chapter 5Figure 5.7: Pulling trace
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Chapter 5Figure 5.9: Indexes with a
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Chapter 6Chapter 6: Scaling SQL Ser
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Chapter 6Figure 6.2: Creating a ser
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Chapter 6• Partitioning and feder
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Chapter 6Figure 6.5: Using partitio
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Chapter 6Implementing Scale-Out Tec
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Chapter 6Suppose that you now add a
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Chapter 6CREATE VIEW AllCustomersAS
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Chapter 6One of the biggest challen
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Chapter 6ReliabilityThe distributed
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Chapter 7Perception = PerformanceMo
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Chapter 7Cursor TypesADO supports a
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Chapter 7Figure 7.2: Server-side cu
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Chapter 7Working with ColumnsUnder
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Chapter 7The problem with DSNs is t
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Chapter 7Managing Connections.NET i
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Chapter 7Notice the use of the Open
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Chapter 7oLocalMaster.Open “c:\ap
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Chapter 7Figure 7.4: One client can
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Chapter 8Chapter 8: Getting the Bes
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Chapter 8Column Purpose ExampleStre
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Chapter 8Miscellaneous Database Des
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Chapter 8SQL Server doesn’t seem
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Chapter 8Use Microsoft Message Queu
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Chapter 8Always Have a Clustered In
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Chapter 8• The first column you s
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Chapter 8Avoid Cursors!Cursors are
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Chapter 8• It’s impossible to a
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