oracle sql performance tuning and optimization it s all about the cardinalities

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Oracle Sql Performance Tuning And Optimization

Author : Kevin Meade
ISBN : 1501022695
Genre : Computers
File Size : 46. 59 MB
Format : PDF, Kindle
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Written by a Senior Database Administrator who has worked with the Oracle RDBMS for thirty years, this is a book which teaches the skill of SQL Tuning for the Oracle Database. Not a list of one-off tricks or tips, nor a glossing over of topics; this book offers an in-depth process covering discovery, analysis, and problem resolution. Learn the science behind SQL Tuning. Learn and apply the FILTERED ROWS PERCENTAGE Cardinality based method of tuning Determine a query's Driving Table and Join Order Construct Query Diagrams, Data Models, and Join Trees Build and use Count / Filter / and Reconstruction Queries Identify Waste in a Query Execution Plan Zero in on Cardinality Divergence using Estimated vs. Actuals Use the ACCESS / FILTER / COVERAGE strategy to build indexes for Problem Queries Exploit THE 2% RULE in analyzing Access method and Join method Classify queries as Precision Style or Warehouse Style Understand Hash Join mechanics and make Hash Joins go faster Make HINTS work as Detection Tools rather than clubs Avoid early Database Design flaws Manage Statistics and deal with common Statistics problems (NDV, Uniform Distribution, Independence, Dynamic Sampling) (Staleness, Skew, Dependence, Defaulting, Out-Of-Bounds, Transiency, Bloat) Perfect your Question Based Analyis Technique and more Included are: a special chapter for EXADATA, a LAB which demonstrates the cardinality based process of SQL Tuning, and twenty three magical SQL scripts that make the process of SQL Tuning easy to do. Learn the skill of SQL Tuning as taught by an expert who does it for a living, and become the go-to specialist in your company. Chapter 1: DRIVING TABLE and JOIN ORDER Chapter 2: Ways to Use a Query Execution Plan Chapter 3: The Best Indexes for a Query Chapter 4: JOINS Chapter 5: HINTS Chapter 6: BASICS Chapter 7: ROW COUNTS and RUN TIMES Chapter 8: EXADATA LAB: Reverse Engineering the QEP Appendix: Know Your Scripts Scripts for analyzing queries and plans Scripts for examining an active database Scripts for looking at metadata showplan showplanshort showplanconstraints showplancountqueries showplandatamodel showplandrivingtable showplanfilterqueries showplanfrpspreadsheetcode showplanindexes showplannumrows showplanquerydiagram showplantables showplantablesunique loadplanfromcache loadplanfromhist showtopcpu showowner showindexes showconstraints showcolstats showhistograms showallscanrates showallworkareas It's all about the Cardinalities

Expert Oracle Sql

Author : Tony Hasler
ISBN : 9781430259787
Genre : Computers
File Size : 61. 54 MB
Format : PDF, ePub, Docs
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Expert Oracle SQL: Optimization, Deployment, and Statistics is about optimizing individual SQL statements, especially on production database systems. This Oracle-specific book begins by assuming you have already identified a particular SQL statement and are considering taking steps to improve its performance. The book describes a systematic process by which to diagnose a problem statement, identify a fix, and to implement that fix safely in a production system. You'll learn not only to improve performance when it is too slow, but also to stabilize performance when it is too variable. You'll learn about system statistics and how the Cost-Based Optimizer uses them to determine a suitable execution plan for a given statement. That knowledge provides the foundation from which to identify the root cause, and to stabilize and improve performance. Next after identifying a problem and the underlying root cause is to put in place a solution. Expert Oracle SQL: Optimization, Deployment, and Statistics explains how to apply various remedies such as changing the SQL statement, adding hints, changing the physical design, and more, and how they can be brought to bear on fixing a problem once and for all. Rolling a change out smoothly is an important topic when dealing with tuning and optimization. Expert Oracle SQL: Optimization, Deployment, and Statistics does not let you down in this critical area. The book contains two chapters of good information from an experienced professional on how to safely deploy changes into production so that your systems remaining running and available throughout the deployment process. Describes a systematic approach to tuning Oracle SQL Explains how things are supposed to work, what can go wrong, and how to fix it Takes you through the steps needed to stabilize performance in your production systems

Oracle Sql Tuning With Oracle Sqltxplain

Author : Stelios Charalambides
ISBN : 9781430248101
Genre : Computers
File Size : 73. 60 MB
Format : PDF, Mobi
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Oracle SQL Tuning with SQLTXPLAIN is a practical guide to SQL tuning the way Oracle's own experts do it, using a freely downloadable tool called SQLTXPLAIN. Using this simple tool you'll learn how to tune even the most complex SQL, and you'll learn to do it quickly, without the huge learning curve usually associated with tuning as a whole. Firmly based in real world problems, this book helps you reclaim system resources and avoid the most common bottleneck in overall performance, badly tuned SQL. You'll learn how the optimizer works, how to take advantage of its latest features, and when it's better to turn them off. Quickly tune any SQL statement no matter how complex. Build and tune test cases without affecting production. Use the latest tuning features with confidence.

Oracle Database 12c Performance Tuning Recipes

Author : Sam Alapati
ISBN : 9781430261889
Genre : Computers
File Size : 88. 22 MB
Format : PDF, ePub
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Performance problems are rarely "problems" per se. They are more often "crises" during which you’re pressured for results by a manager standing outside your cubicle while your phone rings with queries from the help desk. You won’t have the time for a leisurely perusal of the manuals, nor to lean back and read a book on theory. What you need in that situation is a book of solutions, and solutions are precisely what Oracle Database 12c Performance Tuning Recipes delivers. Oracle Database 12c Performance Tuning Recipes is a ready reference for database administrators in need of immediate help with performance issues relating to Oracle Database. The book takes an example-based approach, wherein each chapter covers a specific problem domain. Within each chapter are "recipes," showing by example how to perform common tasks in that chapter’s domain. Solutions in the recipes are backed by clear explanations of background and theory from the author team. Whatever the task, if it’s performance-related, you’ll probably find a recipe and a solution in this book. Provides proven solutions to real-life Oracle performance problems Offers relevant background and theory to support each solution Gets straight to the point for when you're under pressure for results

Oracle Database 12c Release 2 Performance Tuning Tips Techniques

Author : Richard Niemiec
ISBN : 9781259589690
Genre : Computers
File Size : 55. 20 MB
Format : PDF, ePub, Docs
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Proven Database Optimization Solutions―Fully Updated for Oracle Database 12c Release 2 Systematically identify and eliminate database performance problems with help from Oracle Certified Master Richard Niemiec. Filled with real-world case studies and best practices, Oracle Database 12c Release 2 Performance Tuning Tips and Techniques details the latest monitoring, troubleshooting, and optimization methods. Find out how to identify and fix bottlenecks on premises and in the cloud, configure storage devices, execute effective queries, and develop bug-free SQL and PL/SQL code. Testing, reporting, and security enhancements are also covered in this Oracle Press guide. • Properly index and partition Oracle Database 12c Release 2 • Work effectively with Oracle Cloud, Oracle Exadata, and Oracle Enterprise Manager • Efficiently manage disk drives, ASM, RAID arrays, and memory • Tune queries with Oracle SQL hints and the Trace utility • Troubleshoot databases using V$ views and X$ tables • Create your first cloud database service and prepare for hybrid cloud • Generate reports using Oracle’s Statspack and Automatic Workload Repository tools • Use sar, vmstat, and iostat to monitor operating system statistics

The Art And Science Of Oracle Performance Tuning

Author : Christopher Lawson
ISBN : UOM:39015058265664
Genre : Computers
File Size : 52. 57 MB
Format : PDF, Kindle
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Solving or planning for performance issues is a core part of the database professional's toolkit. The Oracle database is very flexible, making it suitable for a wide range of applications. Consequently, it is highly tunable, presenting a bewildering set of choices to the inexperienced. Tuning Oracle is as much about approach as about understanding the technology. It is more than tweaking parameters or following a set prescriptionit involves matching application-specific knowledge with what's happening inside the database. Based on author Christopher Lawson's long experience working with Oracle, The Art and Science of Oracle Performance Tuningbook uses a five-step model to help identify and isolate the cause of nonperformance. This book shows you how to approach problems, get the information you need from Oracle, and follow the process through to success.

Oracle High Performance Sql Tuning

Author : Donald K. Burleson
ISBN : 0072190582
Genre : Computers
File Size : 57. 94 MB
Format : PDF
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From the official Oracle Press comes a comprehensive guide to tuning SQL statements for optimal execution. This expert resource explains how to view the internal execution plan of any SQL statement and change it to improve the performance of the statement. You'll get details on Oracle's optimizer modes, SQL extensions, the STATSPACK utility, and a wealth of methods for tuning Oracle SQL statements.

Oracle Sql High Performance Tuning

Author : Guy Harrison
ISBN : 0136142311
Genre : Computers
File Size : 89. 63 MB
Format : PDF, Mobi
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The complete developer's guide to optimizing Oracle SQL code. Optimizing SQL code is the #1 factor in improving Oracle database performance. Yet most guides to Oracle tuning virtually ignore SQL. "Until now." "Oracle SQL High-Performance Tuning" zeroes in on SQL, showing how to achieve performance gains of 100% or more in many applications. Expert Oracle developer Guy Harrison presents a detailed overview of SQL processing, and then introduces SQL tuning guidelines that improve virtually any application. Learn how to: Choose execution plans. Work with joins. Search for nulls and ranges. Trace SQL statement execution. Build indexes that support efficient queries. Optimize virtually all type of SQL including: views, hierarchical queries, table scans, GROUP BY, updates, subqueries, distributed SQL, and more. As databases grow, and ad hoc queries to data warehouses increase, optimizing SQL becomes even more critical. Harrison offers practical guidance on using Oracle's parallel query facility for large-volume queries, and shows when to use Oracle's PL/SQL instead of standard SQL. The book is replete with examples, showing poorly tuned SQL, how to fix it--and specific performance measurements collected on a wide range of computer hardware, from high-end UNIX SMP hosts to 486 laptops running Personal Oracle. The CD-ROM contains an extraordinary collection of Oracle SQL tuning tools, including: A complete freeware Tuning Toolkit for generating SQL execution plans in a Windows environment, and for monitoring server load and efficiency. Trial versions of the SQLab tuning environment, Precise/SQL tuning tools, and SQL Navigator development environment. Full-function 90-daytrial versions of Personal Oracle for Windows 3.1 and Windows 95. If your Oracle applications must deliver supercharged performance, you can't afford to be without Guy Harrison's "Oracle SQL High-Performance Tuning."

High Performance Oracle Data Warehousing

Author : Donald Burleson
ISBN : STANFORD:36105023725653
Genre : Computers
File Size : 52. 5 MB
Format : PDF, ePub, Mobi
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"High Performance Oracle Data Warehousing" takes readers beyond the basics, showing them how to create compact, efficient, lightning-fast data warehouse systems with Oracle. The CD-ROM contains all examples and source code used in the book, including SQL scripts, optimized database tables, templates, and more.

High Performance Oracle8 Sql Programming And Tuning

Author : Pete Cassidy
ISBN : 1576102130
Genre : Computers
File Size : 22. 56 MB
Format : PDF, ePub, Docs
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Here is everything an Oracle professional needs to know about writing the most efficient SQL statements possible. Unlike other books on Oracle8, this book emphasizes tuning the actual SQL statement, not the Oracle8 database. The CD-ROM contains every SQL statement so that readers can use them on their own projects.

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