In this video we explain how to gather the database optimizer statistics #performancetuning, #oracledatabase, #oracle, #database, #optimizerstatistics, #learning, About Optimizer Statistics Collection In Oracle Database, optimizer statistics collection is the gathering of optimizer statistics for database objects, including fixed objects. The database can collect optimizer statistics automatically. You can also collect them manually using the DBMS_STATS package. Purpose of Optimizer Statistics Collection The contents of tables and associated indexes change frequently, which can lead the optimizer to choose suboptimal execution plan for queries. To avoid potential performance issues, statistics must be kept current. To minimize DBA involvement, Oracle Database automatically gathers optimizer statistics at various times. Some automatic options are configurable, such enabling AutoTask to run DBMS_STATS. Stats collection Stats gathering database performance tuning, 10g, 11g 12c database administration
Views: 144 KINGS TUBE
Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period.Oracle database #ORACLEWORLD #OracleOptimizerStatistics Unbeatable,Unbreakable Platform..
Views: 6824 Oracle World
Tom Kyte discusses enhanced optimizer statistics followed by a demo of on-load statistics gathering in Oracle Database 12c. "Online Statistics Gathering for Bulk Loads" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=TGSQL344 "Histograms" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=TGSQL366 "CREATE TABLE ... AS SELECT" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=DWHSG8317 "CREATE TABLE" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=SQLRF01402
Views: 7941 OracleDBVision
Connect with me or follow me at https://www.linkedin.com/in/durga0gadiraju https://www.facebook.com/itversity https://github.com/dgadiraju https://www.youtube.com/c/TechnologyMentor https://twitter.com/itversity
Views: 4399 itversity
Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period. #ORACLEWORLD #OptimizerStatistics Oracle database Unbeatable,Unbreakable Platform.
Views: 2309 Oracle World
If you want to tune queries, you have to look at query plans and you have to understand what they’re showing you. One thing people look for when tuning is “bad cardinality estimates”. If you’ve wondered what that means, and you want to understand how the optimizer uses statistics when creating a query plan, then join me for this session on statistics and query plans. We’ll set the stage with a review of what statistics are, then see how the optimizer uses them and where to find that “cardinality estimate” information in a plan. We’ll also cover the various ways statistics can be updated, explore what happens to plans when those updates occur, and ultimately you will see why understanding how it all works is critical when you’re troubleshooting performance issues. Expect lots of demos so you can truly understand what statistics are, how they're used, and why their management is so essential for good performance.
Views: 71 Sarah H
Oracle tutorial: Explain plan for query optimization in Oracle PLSQL oracle tutorial for beginners using execution plan to optimize query sql query analyzer sql query cost analysis https://techquerypond.wordpress.com This oracle tutorial show you how to use EXPLAIN PLAN in oracle. This video covers how to check cost of the query from DBMS_XPLAN.DISPLAY . You can find the cost of the query using the Using EXPLAIN PLAN FOR and based on the result you can optimize the query for faster performance. Subscribe on youtube: https://www.youtube.com/channel/UCpiyAesWNYOXSz5GPq8lbkA For more tutorial please visit #techquerypond https://twitter.com/techquerypond
Views: 10816 Tech Query Pond
In this video, you will learn some quick techniques to identify which stats objects are being used by the SQL Optimizer. These techniques can help you in your query tuning endeavors. Video resources including presentation, demo files, code snippets and more learning material is available on http://www.dataplatformgeeks.com/ (Join for free and access all the resources) Connect With The Speaker (Amit Bansal) -Follow on Twitter: https://twitter.com/A_Bansal -Follow on FaceBook at http://www.facebook.com/amit.r.bansal -Follow on LinkedIN: http://www.linkedin.com/in/amitbansal2010 -Facebook Page: https://www.facebook.com/AmitRSBansal/ Connect with SQLMaestros: http://sqlmaestros.com/ -http://www.twitter.com/SQLMaestros -https://www.facebook.com/SQLMaestros -Email us: [email protected] Have technical questions? Join the largest SQL group on FB www.facebook.com/groups/theSQLGeeks Our LinkedIn group https://www.linkedin.com/groups/6753546 DataPlatformGeeks (DPG) Community Join the fastest growing community of data & analytics professionals Why Join DPG? http://www.dataplatformgeeks.com/ -Attend all events hosted by DPG, including SQLMaestros Special Events -Get access to free videos, labs, magazines and host of learning resources -Download all events & conference material -Learn new skills. Sharpen existing skills -Be part of Asia’s Largest Data/Analytics Community -Opportunity to be a regional mentor & speaker at our events -Immense technical & professional development Do you know about Data Platform Summit? http://www.DPS10.com
Views: 435 SQLMaestros
Ahmed Jassat - Oracle Ebus Gather Schema from 3 hours to 3 minutes
Views: 988 Ahmed Jassat
When it comes to writing efficient queries there are a few key concepts that need to be understood. One of them is the Oracle Cost-Based Optimizer (CBO). Although it's called a cost-based optimizer it's actually not the cost we need to focus on primarily to understand why the optimizer makes certain decisions. In this webinar, you will learn the basics of the CBO, see why it is crucial that the optimizer's picture of the data fits reality, why cardinality and selectivity estimates matter so muc
Views: 58412 Redgate Videos
MarkZ sits down for an interview with Tim "Magic" Sevenhuysen, a man who has been working behind the scenes to provide important statistics and analytical tools for analysts, coaches, the media, and more in the world of League of Legends esports. Among those in the LoL esports field, Oracle's Elixir has become the go-to place to obtain League of Legends statistics which have become increasingly valuable as teams delve into the numbers to help give their players an extra edge. Statistics from the website are regularly referenced by broadcasters, writers, and players. The site is often referenced and featured on the LCS, LCK, LMS, CBLoL, and Intel Extreme Masters broadcasts to name a few places where the data is put to use. Connect with us for more content: League of Legends Videos: https://goo.gl/MoeSRf Overwatch Videos: https://goo.gl/XhAe5O Esports Chatter: https://goo.gl/Uk07gI PROFiles Videos: https://goo.gl/fqMp7e Website: http://www.akshonesports.com Facebook: https://www.facebook.com/akshonesports/ Instagram: https://www.instagram.com/akshonesports/ Twitter: https://twitter.com/akshonesports You can follow Tim and his work here: https://oracleselixir.com Twitter: https://goo.gl/ZHZN7K
Views: 555 Akshon Esports Overwatch
Oracle Ace Liron Amitzi presents an entertaining session about appreciating the Oracle Optimizer; exploring the stability of plans and examining new features that ruin your system performance, just when you get it tuned just right.
Views: 568 Database Community
The better the information that Oracle and SQL Server have about the data in a database, the better choices they can make on how to execute the SQL. Statistics are Oracle's and SQL Server's chief source of information. If this information is out of date, performance of queries will suffer. In their third live 'Oracle vs. SQL Server' discussion, Jonathan Lewis (Oracle Ace Director, OakTable Network) and Grant Fritchey (Microsoft SQL Server MVP) will look at statistics in Oracle and SQL Server. Do Oracle and SQL Server gather the same information? What does each optimizer use this information for? And how can Oracle and SQL Server administrators override the defaults for better (or worse) performance? These are just some of the questions that Jonathan and Grant will try to answer in another not-to-be-missed session. As before, this will be a live discussion with limited supporting slides, and will conclude with a Q+A session with Jonathan and Grant. Be prepared for a lively exchange that will not only entertain, but will teach you key concepts on Oracle and SQL Server. For our complete archive please go to http://www.red-gate.com/oracle-webinars
Views: 2365 Redgate Videos
Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period. #Optimizerplans #ORACLEWORLD
Views: 1542 Oracle World
Lock and Unlock table statistics in Oracle Database
Views: 190 Oracle database help
Held on May 1 2018 If you are running an Oracle Database proof of concept or benchmark focusing on performance, what optimizer settings should you use? What statistics do you need to gather and how should you gather them? In this session Nigel Bayliss shows how you can get consistent results and avoid burning time chasing problems. Covers Oracle Database 12c Release 1 onwards. 3:55 The Adaptive Optimizer (12.1) 8:44 The Mechanics of Adaption 12:03 Adaptive Optimizer Settings 16:18 Recommended Defaults 18:53 12.1 Proof of Concept Recommendations 21:26 12.2+ Proof of Concept Recommendations 34:35 Regathering Statistics 42:24 Dynamic Sampling and Parallel 44:55 More General Recommendations AskTOM Office Hours offers free, monthly training and tips on how to make the most of Oracle Database, from Oracle product managers, developers and evangelists. https://asktom.oracle.com/ https://developer.oracle.com/ https://cloud.oracle.com/en_US/tryit music: bensound.com
Views: 194 Oracle Developers
One of the most interesting new features of the Oracle Database Optimizer is the ability to recognize its own mistakes and use execution statistics to automatically improve execution plans. Oracle calls this "Adaptive Optimization" and this talk will focus on how it works. More webinars at: http://www.red-gate.com/oracle-webinars
Views: 6942 Redgate Videos
In this tutorial you will learn advanced oracle tuning techniques for the optimizer.
Views: 459 DBA Pro
Presented by Randolf Geist 01 August 2012 Summary Building on the previous Cost-Based Optimizer Basics webinar, in this almost "zero-slide" session we'll explore different aspects of the Cost-Based Optimizer that haven't been covered or only mentioned briefly in the 'basics' session. This is a continuous live demonstration including topics like: Clustering Factor, Histograms, Dynamic Sampling, Virtual Columns, Daft Data Types and more. If you've ever asked yourself why a histogram can be a threat to database performance and why storing data using the correct data type matters regarding Execution Plans then this session is for you. It is recommended, although not required, to watch the recording of the 'basics' webinar first. A live Q+A session with Randolf Geist will follow the presentation. For our complete archive, and to sign up for upcoming webinars please go to http://www.red-gate.com/oracle-webinars
Views: 6618 Redgate Videos
“Why isn’t my query using an index?” is a common question people have when tuning SQL. This session explores the factors that influence the optimizer’s decision to answer this question. It does so by comparing fetching rows from a database table to finding all the red M&Ms a packet, and contrasts using an index range scan and a full table scan. It also introduces the concepts of blocks and the clustering factor. The session offers a discussion of how these affect the optimizer's calculations, and includes a demo of how these concepts work in practice using real SQL queries. This session is intended for developers who want to learn the basics of how the optimizer chooses between an index range or full table scan. Speaker: Chris Saxon
Views: 272 Oracle Developers
In part 2 of the "Migrate a 1TB Datawarehouse in 20 Minutes" video series, Andrew Holdsworth, Senior Director of Oracle's Real World Performance (RWP) team, shows the most efficient methods for gathering optimizer statistics against the 1TB of data loaded onto an Oracle Exadata Database Machine. Copyright © 2012 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the "Materials"). The Materials are provided "as is" without any warranty of any kind, either express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, and non-infringement.
Views: 6309 Oracle Learning Library
How to gather session stats using Session Built In Variable? Use session built in variable at command or email component of a respective task's command tab.
Views: 1770 Mandar Gogate
Two Aussie Oracle ACE Alumni catch up in Perth at the end of a half-day session on database features and data clustering. blog: https://connor-mcdonald.com twitter: https://twitter.com/connor_mc_d Richard's Blog: https://richardfoote.wordpress.com Richard's Indexing Webinar: https://richardfooteconsulting.com/indexing-webinar/ Trivadis Performance Days: https://www.trivadis.com/en/training/performance-days-2018-tvdpdays Gather Plan Statistics hint: https://docs.oracle.com/en/database/oracle/oracle-database/18/tgsql/optimizer-statistics-concepts.html DBMS_REDEFINTION docs: https://docs.oracle.com/en/database/oracle/oracle-database/18/arpls/DBMS_REDEFINITION.html Subscribe for new tech videos every week Music: https://soundcloud.com/joakimkarud Any endorsement of non-Oracle products and/or companies in this video should not be viewed as an official endorsement from Oracle Corporation.
Views: 372 Connor McDonald
For more information visit: http://bit.ly/OHM13_web To download the video visit: http://bit.ly/OHM13_down Playlist OHM 2013: http://bit.ly/OHM13_pl Speaker: bastinat0r In my current project I gather and visualize data from the spaceAPI. I will tell people about my project and what is cool about spaceAPI. Because we have no official opening hours at our hackerspace I wanted to gather statistics to see when the door is open. Then I extendet the software to work for all spaces in the directory of spaceAPI.net - you can see the result at http://spacestatus.bastinat0r.de
Views: 269 Christiaan008
Learn the new 12c options for creating histograms. See all free video tutorials at http://www.skillbuilders.com/free-oracle-tutorials. In this free tutorial, Oracle Certified Master DBA John Watson demonstrates what histograms do (provide correct cardinality), the difference between histogram types (Frequency and Height Balanced). You will also learn the importance of the auto sample size algorithm in 12c and the new "Hybrid" and "Top Frequency" type histograms.
Views: 3572 SkillBuilders
Statistics and Predictive Analytics in Oracle Database and Hadoop: Oracle Technology Summit - Virtual Technology Days 2015
Views: 3136 Oracle Advanced Analytics
A overview of the function based index and a common mistake which is made by most of us.
Views: 525 Saurabh Kumar
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Views: 190 Durga Software Solutions
This Tutorial will explain fundamentals of Oracle AUTOTRACE. Set up & Use AUTOTRACE. Review PLAN & Statistics generated by AUTOTRACE. Understanding Statistics details.
Views: 22894 Anindya Das