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 : 57. 94 MB
Format : PDF, ePub, Docs
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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

Sql Performance Explained

Author : Markus Winand
ISBN : 3950307818
Genre : SQL (Computer program language)
File Size : 84. 23 MB
Format : PDF
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Expert Oracle Sql

Author : Tony Hasler
ISBN : 9781430259787
Genre : Computers
File Size : 52. 77 MB
Format : PDF, Mobi
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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

Performance Tuning F R Oracle Datenbanken

Author : Leonid Nossov
ISBN : 9783642330537
Genre : Computers
File Size : 21. 92 MB
Format : PDF, ePub, Docs
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Stellen Sie sich vor, Ihre Datenbank lahmt plötzlich oder steht gar. Es kann auch sein, dass einige Anwendungsteile zu langsam sind, und Sie wissen nicht, warum. Wie klärt man die Ursache schlechter Performance und wie beseitigt man sie am effektivsten? Welche Möglichkeiten bietet Oracle? Welche anderen nicht oder nur spärlich beschriebenen Methoden und Tricks kann man anwenden, damit Ihre Datenbank wieder richtig „tickt“? Aus diesem Blickwinkel betrachtet der Autor diverse Oracle-Features. Sie sind auch mit Test-Cases versehen, so dass der Leser selbst deren „Tiefen“ untersuchen kann. Da „machs-wie-ich“ eine der besten Lehrmethoden ist, sind zahlreiche Fälle im Buch präsentiert, die direkt für die Praxis umsetzbar sind. Die begleitende Webseite bietet Test-Cases für einige Features sowie SQL- und PLSQL-Skripte für Performance Tuning.

Oracle Database 12c Performance Tuning Recipes

Author : Sam Alapati
ISBN : 9781430261889
Genre : Computers
File Size : 62. 10 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 Sql Tuning With Oracle Sqltxplain

Author : Stelios Charalambides
ISBN : 9781430248101
Genre : Computers
File Size : 22. 93 MB
Format : PDF, Kindle
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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 Sql Tuning

Author : Mark Gurry
ISBN : 3897212420
Genre : Oracle (Computer file)
File Size : 43. 40 MB
Format : PDF, Kindle
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Oracle Pl Sql Programmierung

Author : Steven Feuerstein
ISBN : 389721184X
Genre : ORACLE 9i
File Size : 32. 27 MB
Format : PDF, ePub, Docs
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Performance Tuning F R Oracle Datenbanken

Author : Leonid Nossov
ISBN : 9783642330537
Genre : Computers
File Size : 56. 92 MB
Format : PDF, Mobi
Download : 820
Read : 357

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Stellen Sie sich vor, Ihre Datenbank lahmt plötzlich oder steht gar. Es kann auch sein, dass einige Anwendungsteile zu langsam sind, und Sie wissen nicht, warum. Wie klärt man die Ursache schlechter Performance und wie beseitigt man sie am effektivsten? Welche Möglichkeiten bietet Oracle? Welche anderen nicht oder nur spärlich beschriebenen Methoden und Tricks kann man anwenden, damit Ihre Datenbank wieder richtig „tickt“? Aus diesem Blickwinkel betrachtet der Autor diverse Oracle-Features. Sie sind auch mit Test-Cases versehen, so dass der Leser selbst deren „Tiefen“ untersuchen kann. Da „machs-wie-ich“ eine der besten Lehrmethoden ist, sind zahlreiche Fälle im Buch präsentiert, die direkt für die Praxis umsetzbar sind. Die begleitende Webseite bietet Test-Cases für einige Features sowie SQL- und PLSQL-Skripte für Performance Tuning.

Expert Oracle Practices

Author : Pete Finnigan
ISBN : 9781430226680
Genre : Computers
File Size : 83. 40 MB
Format : PDF, ePub, Mobi
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This book is an anthology of effective database management techniques representing the collective wisdom of the OakTable Network. With an emphasis upon performance—but also branching into security, national language, and other issues—the book helps you deliver the most value for your company’s investment in Oracle Database technologies. You’ll learn to effectively plan for and monitor performance, to troubleshoot systematically when things go wrong, and to manage your database rather than letting it manage you. What you’ll learn Adopt a rational approach to database management; eliminate guesswork Add value to your organization as a database professional Manage and optimize performance Exploit different platform technologies Secure your organization's data Gain deep understanding of database internals and structures Who this book is for This book is aimed at Oracle database administrators who want to further their careers by implementing sound and proven database administration practices—and especially repeatable and predictable practices—in their daily work. Table of Contents Battle Against Any Guess A Partly Cloudy Future Developing a Performance Methodology The DBA as Designer Running Oracle on Windows Managing SQL Performance PL/SQL and the CBO Understanding Performance Optimization Methods Choosing a Performance Optimization Method Managing the Very Large Database Statistics Troubleshooting Latch Contention Measuring for Robust Performance User Security Securing Data

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