sql queries performance tuning tips

... Database 10g Performance Tuning Tips & Techniques Tuning and Testing PL /SQL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472 PL /SQL Object ... looking for simple tips to help improve performance. This book has one simple goal: to provide an arsenal of tips you can use in various xxxiv Oracle Database 10g Performance Tuning Tips & Techniques ... . . . . . . 554 xvi Oracle Database 10g Performance Tuning Tips & Techniques “Rich Niemiec does it again. Any other book on Oracle performance and tuning is an appetizer to Rich’s main course....

Ngày tải lên: 24/01/2014, 04:20

Ngày tải lên: 17/03/2014, 10:20

... faultấVVếấĩiấ>ấôViấiàếiấV`iấấ`>è>ấè>èấấèấấèấĩ}ấ ièấấiiĩiiấấôịV>ấiịấ>`ấếèấLiấièii`ấvấ` /iấôii`ấvấ>ấ`ấ>VViấấấèiấ`iấvấiV`]ấĩii>ấ>ấiịấ>VViấấấ èiấ`iấvấ>iV`ấ/ấế}iấ`vviiViấấèiấôii`ấLièĩiiấ>ấ`ấ>VViấ>`ấ>ấi- ịấ>VViấ>iấèiấivviVèấvấ>`ấô>}iấv>ếèấ}vV>èấVô>i`ấèấè>èấvấvèấô>}iấv>ếè /iấL]cao+oa_ấVếèiấiôiièấèiấếLiấvấô>}iấi>`ấvấấĩèèiấèấ`ấôiấ iV`ấèấiiấ>`ấô>}iấv>ếèấ/iấL]caB]qhpo+oa_ performance counter indicates the total page faults per second—soft page faults plus hard page faults—handled by the system. CHAPTER 2 N SYSTEM PERFORMANCE ANALYSIS 19 Dynamic ... ĩ>èấấii]ấịếấV>ấ`ièvịấèiấĩ>èấèịôiấ>`ấLi}ấèếLiè}ấ"iấvấèiấèấ CHAPTER 2 N SYSTEM PERFORMANCE ANALYSIS 22 SQL Server Memory Management -+Ê-iÀÛiÀÊ>>}ià memory for databases, including ... -đấấèấèiấiịấv`iấvấèiấ-iiấ*ôièiấ`>}ấLí]ấ>ấĩấấ }ếiấểẻ Figure 2-3. SQL Server memory configuration /iấ`ị>Vấiịấ>}iấấVèi`ấèế}ấèĩấVv}ế>èấôôièi\ấ Iejeiqi$I>% and I]teiqi$I>%. CHAPTER 2 N SYSTEM PERFORMANCE ANALYSIS 28 Figure...

Ngày tải lên: 17/12/2013, 02:15

... xxv CHAPTER 1 SQL Query Performance Tuning 1 The Performance- Tuning Process 2 The Core Process 2 Iterating the Process 4 Performance vs. Price 7 Performance Targets 7 “Good Enough” Tuning 7 Performance ... CHAPTER 1 N SQL QUERY PERFORMANCE TUNING 15 Summary In this introductory chapter, you have seen that SQL Server performance tuning is an itera- tive process, consisting of identifying performance ... xxv CHAPTER 1 SQL Query Performance Tuning 1 CHAPTER 2 System Performance Analysis 17 CHAPTER 3 SQL Query Performance Analysis 61 CHAPTER 4 Index Analysis 101 CHAPTER 5 Database Engine Tuning Advisor ...

Ngày tải lên: 17/12/2013, 02:15

... it impacts query tuning) ã SQL Server Integration Servicesã SQL Server Analysis Servicesã SQL Server Reporting Servicesã PowerShellã The Performance Tuning Process e performance tuning process consists ... I cover the following topics: e performance tuning processã Performance vs. priceã e performance baselineã Where to focus eorts in tuning e top 13 SQL Server performance killersã What I dont ... 4. CHAPTER 1 ■ SQL QUERY PERFORMANCE TUNING 8 “Good Enough” Tuning Instead of tuning a system to the theoretical maximum performance, the goal should be to tune until the system performance is...

Ngày tải lên: 12/02/2014, 12:20

... 12/17/2007 7:11pm Page 3 Performance Tuning SQL Server 2005 works great right out of the box. For most SQL Server users, performance is never an issue. They install SQL Server, load up their ... Database Tuning Advisor. ❑ Chapter 12 covers storage subsystem performance and robustness and shows how you can use SQLIO and SQLIOSim to great effect. ❑ Chapter 13 covers using SQL Server Performance ... the performance of this 9 www.it-ebooks.info Wort c01.tex V3 - 12/17/2007 7:11pm Page 4 Part I: Finding Bottlenecks when Something’s Wrong The Science of Performance Tuning Performance tuning SQL...

Ngày tải lên: 16/02/2014, 13:20

Ngày tải lên: 17/03/2014, 19:20

... the OCP: Oracle8i Performance and Tuning and OCP: Oracle8i Network Administration exams. The first part of the book covers the most critical areas of database performance tuning and how to ... architecture. Part One: OCP: Oracle8i Performance Tuning Chapter 1 starts with an overview of the Oracle Tuning Methodology and how it is used to perform effective database tuning. Chapter 2 discusses ... information related to database performance tuning. This includes data dictionary views, trace files, and log files. Chapter 3 introduces you to SQL statement tuning and application design....

Ngày tải lên: 18/10/2013, 18:15

... Manager Enterprise DBA Part 2: Performance Tuning Workshop 15-9 Tuning Session Scope Tuning Session Scope Setting the Tuning Session Scope Setting the scope for the tuning session directs Oracle ... DBA Part 2: Performance Tuning Workshop Contents Appendix E: Dictionary and Dynamic Performance Views Dictionary and Dynamic Performance Views E-2 Data Dictionary Views E-3 Dynamic Performance ... 15-6 Enterprise DBA Part 2: Performance Tuning Workshop Lesson 15: Tuning with Oracle Expert What-If Tuning Once you have gathered all the data required for a tuning session, you can edit...

Ngày tải lên: 19/10/2013, 11:15

... soundex2c.py: C:\samples\soundex\stage2>python soundex2c.py Chapter 18. Performance Tuning Performance tuning is a many-splendored thing. Just because Python is an interpreted language ... It should go without saying that you need a complete set of unit tests before you begin performance tuning. The last thing you need is to introduce new bugs while fiddling with your algorithms. ... source[0].upper() + source[1:].translate(charToSoundex) digits2 = digits[0] optimizing your code for performance, only to discover it doesn't do what you need it to do. That's time down...

Ngày tải lên: 28/10/2013, 16:15

Ngày tải lên: 17/01/2014, 09:20

... testing environments first. 5. Data model tuning may be required if SQL code tuning does not resolve production performance problems. As with SQL code tuning, data model tuning should be done in development ... Oracle Database Performance Views for Tuning SQL 396 12.6.1 Finding Cached SQL Code 396 12.6.1.1 Examining SQL Code 397 12.6.1.2 Hard-Hitting SQL Code 399 12.6.1.2.1 Using V$SQLAREA 399 12.6.1.2.2 ... Problem Queries 367 13 Automated SQL Tuning 409 Part III: Physical and Configuration Tuning 427 14 Tuning Oracle Database File Structures 429 15 Object Tuning 459 16 Low-Level Physical Tuning...

Ngày tải lên: 24/01/2014, 04:20

... Miscellaneous Configurations 367 PART IV Tuning SQL 391 24 What Is a Well-Tuned SQL Statement? 393 25 Using EXPLAIN PLAN and SQL Trace 403 26 Tuning SQL Statements 419 27 Using the Oracle Optimizer ... Using EXPLAIN PLAN and SQL Trace 403 SQL Trace 404 SQL Trace Initialization 404 Controlling SQL Trace 405 SQL Trace Functionality 406 TKPROF Functionality 407 Interpreting SQL Trace 409 The EXPLAIN ... 577 Summary 578 Part VII References 579 A Review of Tuning Guidelines 581 RDBMS Tuning 582 SGA 582 Performance Enhancements 583 OS Tuning 588 OS Tuning Goals 589 OS Features 589 19 Chapter 1 ◆ Introduction...

Ngày tải lên: 24/01/2014, 04:20

... Overview Introduction to Performance Tuning 1-2 Performance Planning 1-2 Instance Tuning 1-2 SQL Tuning 1-5 Introduction to Performance Tuning Features and Tools 1-6 Automatic Performance Tuning Features 1-7 Additional ... Oracle Performance? xxvii Oracle Database 10g Release 1 (10.1) New and Updated Features for Performance Tuning xxviii Part I Performance Tuning 1 Performance Tuning Overview Introduction to Performance ... B10752-01 December 2003 Introduction to Performance Tuning Features and Tools Performance Tuning Overview 1-7 Automatic Performance Tuning Features The Oracle automatic performance tuning features include: ■...

Ngày tải lên: 24/01/2014, 08:20

... 209:12 squid 29227 mysql 5 5 1892 1892 956 S N 0 1.1 0.4 0:00 mysqld 29223 mysql 5 5 1892 1892 956 S N 0 0.9 0.4 0:00 mysqld 29234 mysql 5 5 1892 1892 956 S N 0 0.9 0.4 0:00 mysqld This starts ... Associates, Inc. All rights reserved. 323 Chapter 9 CHAPTER 9 Essential Tools for Performance Tuning To be able to improve the performance of your system you need a prior understand- ing of what can be ... Essential Tools for Performance Tuning 6 mean bytes/connection 807.813 fetches/sec, 4846.88 bytes/sec msecs/connect: 78.4026 mean, 3005.08 max, 0.102 min we can see that the performance goes down—it...

Ngày tải lên: 26/01/2014, 07:20

... Tuning 93 Tuning RDBMS Resources 93 Tuning OS Resources 94 Tuning Hardware Resources 94 Other Tuning Factors 95 System Limitations 95 Summary 95 9 Oracle Instance Tuning 97 Tuning Memory 98 Tuning ... 84 Performance Tuning after the System Is Built 84 Tuning the Client 85 Tuning the Server 85 Tuning the Network 85 Summary 86 Part II Tuning the Server 89 8 What Affects Oracle Server Performance? ... 97 Tuning Memory 98 Tuning the Operating System 99 Tuning the Private SQL and PL /SQL Areas 100 Tuning the Shared Pool 100 Tuning the Buffer Cache 107 Tuning the I/O Subsystem 108 Understanding Disk...

Ngày tải lên: 17/02/2014, 15:20

... the SQL Tuning Advisor 10-2 Managing SQL Tuning Sets 10-4 Creating a SQL Tuning Set 10-5 Creating a SQL Tuning Set: Options 10-5 Creating a SQL Tuning Set: Load Method 10-7 Creating a SQL Tuning ... Details of SQL Statements 9-3 Viewing SQL Statistics 9-5 Viewing Session Activity 9-6 Viewing SQL Execution Plan 9-7 Viewing SQL Tuning Information 9-7 10 Tuning SQL Statements Tuning SQL Statements ... 10-9 Creating a SQL Tuning Set: Schedule 10-11 Deleting a SQL Tuning Set 10-13 Transporting a SQL Tuning Set 10-13 Managing SQL Profiles 10-15 11 Optimizing Data Access Paths Running the SQL Access...

Ngày tải lên: 20/02/2014, 05:21

Ngày tải lên: 07/03/2014, 23:20

Ngày tải lên: 17/03/2014, 00:20

Ngày tải lên: 17/03/2014, 19:20