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: 382 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: 7066 Oracle World
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: 4600 itversity
Ahmed Jassat - Oracle Ebus Gather Schema from 3 hours to 3 minutes
Views: 1010 Ahmed Jassat
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: 201 Oracle Developers
Oracle SQL Tutorial 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: 13144 Tech Query Pond
Views: 6776 nikku bites
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: 272 Christiaan008
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: 2365 Oracle World
Presented by Karen Morton Tues 8th May 2012 Summary SQL is utilized to return data via our applications to service user requests. Whether it's a single customer lookup or a huge month end summary report, the SQL we write must gather the correct data and return it to the user. Ensuring that the SQL you write can do this in a timely and efficient manner, both now and in the future, requires that you measure and evaluate what resources your query must use. In this webinar, we'll cover several methods for how to collect data that show you precisely how your SQL consumes resources: Using AUTOTRACE Using DBMS_XPLAN.DISPLAY_CURSOR Using Report SQL Monitor Using ASH (Active Session History) and AWR (Automatic Workload Repository) data You'll learn how to utilize the data to understand the work your SQL is doing and the resources it consumes; identify currently evident performance issues as well as areas that could be problematic in the future; and modify your SQL to use less resources more efficiently while still returning the desired results. A live Q+A session with Karen Morton follows the presentation. For our complete archive, and to sign up for upcoming webinars please go to http://www.red-gate.com/oracle-webinars
Views: 7156 Redgate Videos
In this session Tanel will walk you through troubleshooting a yet another complex performance issue that he has faced in past. Again, the initial symptoms point to a different direction than the actual root cause, so a systematic approach was needed.
Views: 3862 Tanel Poder
Lock and Unlock table statistics in Oracle Database
Views: 239 Oracle database help
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: 2399 Redgate Videos
Why and How we need to rebuild global Index in Oracle 11g
Views: 3388 Athar Fahad
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: 8169 OracleDBVision
Multiple ways of collecting diagnostics for troubleshooting performance issues. The series of SQL tuning videos presents performance tuning tips for developers. For the presentation used in this video, please visit: https://drive.google.com/drive/folders/0B6EDqGZwjejmWng5VWM3ZEtaNzA?usp=sharing
Views: 4874 anilkumar ghorakavi
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: 1578 Oracle World
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: 1844 Mandar Gogate
For details go to http://www.orapub.com/video-seminar-utilization-on-steroids Utilization On Steroids is a fast-paced, one-hour video seminar for busy Oracle DBAs and Developers. No boring slide decks here! This is high quality video training for an amazing online experience. I has taken me 20+ years to learn what I know and now I'm sharing it with you. You will learn in one hour what took me years to create. I will reveal my approach to calculating utilization. You will see the tools I use in action. I show you how to gather the data and give you my information sources. This nine-module seminar makes you better at Oracle Database performance tuning by digging deep into the realm of utilization. To register and for more information go to: http://www.orapub.com Here is what you can expect to learn: * Possess an intuitive understanding of utilization * See how OS tools gather raw performance data * See how Oracle gathers OS statistics and their reliability * Have the ability to calculate CPU utilization two different ways from v$osstat * Determine your database server's "unit of power" - the core, thread, etc. * Understand the issues with virtualized environments and what to do about them * Be able to apply utilization concepts to IO subsystems, memory and networks * Be able to effectively and authoritatively use utilization in your daily Oracle performance optimization work The course modules are: 1. Introduction/Preview (this video) 2. What is utilization? 3. Where OS tools collect performance data 4. Where Oracle collects OS performance data 5. Calculating OS CPU utilization using the core method 6. Calculating OS CPU utilization using the busy:idle method 7. Utilization challenges and solutions in a virtualized environment 8. Calculating and using your DB server's unit of processing power 9. Additional resources and seminar close To register and for more information go to: http://www.orapub.com
Views: 623 OraPub, Inc.
SQL Monitoring is the best new feature of Oracle 11g for performance analysts, developers and support teams. Finally there is a tool that provides the most accurate, useful and interesting information when a SQL statement is running for longer than expected in a clear format with no minimal advance configuration requirements: What execution plan is really being used? What row source cardinality calculations are incorrect? What steps in the plan are taking the most time and consuming most resources? In this presentation, Doug Burns will demonstrate the various ways of accessing SQL Monitoring functionality and use example reports to show how the information can be used to analyse both currently running and completed statements. It will also describe and offer solutions to some of the minor quirks you might encounter. For our complete archive, and to sign up for upcoming webinars please go to http://www.red-gate.com/oracle-webinars
Views: 5224 Redgate Videos
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: 6662 Redgate Videos
Upgrading critical applications can be very hard and one of the biggest problems organizations face is the availability of the application during the update. Because of the global nature of applications nowadays we want to achieve 99.99% uptime. Since Oracle Database 11g Release 2 Edition Based Redefinition is available to solve this issue. In this session, Patrick Barel will introduce the ideas behind Edition Based Redefinition and how it can be used. He will look at tables, editioning views, cross edition triggers, and how PL/SQL Code can be changed in the different editions. After this session you will have a basic idea on how Edition Based Redefinition works and how it might help you in your situation. You can view our complete archive at http://www.red-gate.com/oracle-webinars
Views: 2156 Redgate Videos
In this tutorial, you'll learn how to compare queries to know the better performance query..
Views: 99423 radhikaravikumar
Learn in depth about trigger in oracle database 11g, and usage of trigger in Database, different types of trigger with syntax for various events along with writing advance trigger and capturing all details regarding authentication. Explained Instead of trigger. Trigger in Oracle, Trigger in PL/SQL, Oracle Trigger, PL/SQL Trigger, What is Trigger in pl/sql, How to use Trigger in pl/sql, How to write a Trigger in oracle, How to design Trigger in pl/sql, DDL trigger, DML trigger, Instead of trigger, Compound trigger, Logon trigger, Introduction to Triggers You can write triggers that fire whenever one of the following operations occurs: DML statements (INSERT, UPDATE, DELETE) on a particular table or view, issued by any user DDL statements (CREATE or ALTER primarily) issued either by a particular schema/user or by any schema/user in the database Database events, such as logon/logoff, errors, or startup/shutdown, also issued either by a particular schema/user or by any schema/user in the database Triggers are similar to stored procedures. A trigger stored in the database can include SQL and PL/SQL or Java statements to run as a unit and can invoke stored procedures. However, procedures and triggers differ in the way that they are invoked. A procedure is explicitly run by a user, application, or trigger. Triggers are implicitly fired by Oracle when a triggering event occurs, no matter which user is connected or which application is being used. How Triggers Are Used Triggers supplement the standard capabilities of Oracle to provide a highly customized database management system. For example, a trigger can restrict DML operations against a table to those issued during regular business hours. You can also use triggers to: Automatically generate derived column values Prevent invalid transactions Enforce complex security authorizations Enforce referential integrity across nodes in a distributed database Enforce complex business rules Provide transparent event logging Provide auditing Maintain synchronous table replicates Gather statistics on table access Modify table data when DML statements are issued against views Publish information about database events, user events, and SQL statements to subscribing applications Linkedin: https://www.linkedin.com/in/aditya-kumar-roy-b3673368/ Facebook: https://www.facebook.com/SpecializeAutomation/
Views: 11063 Specialize Automation
http://www.testpassport.jp/Oracle-Database/1Z0-064.asp をご参照ください 1Z0-064認定試験を受験して資格を取得することを通して、彼らの知識やスキルを向上させます。 1Z0-064認定試験を基づいてもっと専門的な資格をもらて個人履歴を増やすため、受験する人が益々増えて来ました。 Testpassportは、世界で最も信頼性の高いOracle Database 1Z0-064認定トレーニング資料を持っており、それをあなたはあなたの素晴らしい計画を達成することができます。 Oracle Database 1Z0-064試験概要： 試験番号:1Z0-064 試験名称：Oracle Database 12c: Performance Management and Tuning 関連資格: Oracle Certified Expert, Oracle Database 12c: Performance Management and Tuning バージョン: Oracle Database 12c 試験時間:150 出題数: 84 合格ライン:62% 出題形式:Multiple Choice 試験料(税抜き): 26600 円 TestpassportのOracle Database 1Z0-064試験問題と解答はあなたが必要とした一切の試験トレーニング資料を準備して差し上げます。TestpassportのOracle Database 1Z0-064問題集のカバー率がとても高いですから、自分で勉強するよりずっと効率が高いです。 Oracle Database 1Z0-064試験の出題内容： Basic Tuning Diagnostics Using Automatic Workload Repository Using Metrics and Alerts Using Baselines Monitoring Real-Time Database Operation Using AWR-Based Tools Monitoring Applications Identifying Problem SQL Statements Influencing the Optimizer Reducing the Cost of SQL Operations Using SQL Performance Analyzer SQL Performance Management Using Database Replay Tuning the Shared Pool Tuning the Buffer Cache Tuning PGA and Temporary Space Using Automatic Memory Tuning I/O Using the Database Resource Manager 高い点数配分になっており、それらを落とすと合格率が下がるので、TestpassportのOracle Database 1Z0-064（Oracle Database 12c: Performance Management and Tuning）勉強資料の使用を必要があります。正確な1Z0-064練習問題集を選択をしたら、そんなに苦労しなくても成功することもできます。 弊社のOracle Database 1Z0-064無料サンプルを使用してから、認定試験をパスするのに自信を持っています。 1.You have been asked to use table compression for two large tables. Given are the details of the tables: The TRANS_DET table: - The table is used by an OLTP application. - High volume insert and update operations are performed on the table. - The table is frequently queried using index range scans. The TRANS_HISTORY table: - The table is used by a DSS application. - High volume bulk loads are performed on the table. - The table is used to store archival data on which large table full-table scans (FTS) are performed. Which row store compression would you recommend for these tables with minimal overhead on performance? (Choose the best answer.) A. basic table compression for both the tables B. advanced row compression for both the tables C. basic table compression for the TRANS_HISTORY table and advanced row compression for the TRANS_DET table D. basic table compression for the TRANS_DET table and advanced row compression for the TRANS_HISTORY table E. warehouse compression for the TRANS_DET table and archive compression for the TRANS_HISTORY table Answer: A 2.You want to generate statistics for new objects added to an OLTP application without affecting old statistics and the sessions that currently use them. Which two tasks would you perform to test the new statistics? (Choose two.) A. Set the OPTIMIZER_USE_PENDING_STATISTICS initialization parameter to TRUE for the session. B. Set the STALE_PERCENT statistics preference to zero and then gather statistics. C. Set the PUBLISH statistics preference to FALSE and then gather statistics. D. Use the DBMS_STATS.PUBLISH_PENDING_STATS procedure to make pending statistics the current statistics. E. Set the NO_INVALIDATE statistics preference to FALSE and gather statistics without affecting old statistics. Answer: A,B
Views: 4 深野晴美
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: 387 Connor McDonald
In this video you will learn how to update Statistics of All databases in SQL Server using SQL Server Management studio as well as using T-SQL Script. It shows different options of updating the statistics such as Index statistics, column statistics and statistics of single database using SQL Server Management Studio as well as using T-SQL Script. Blog post link for the video with script http://sqlage.blogspot.com/2015/04/how-to-update-statistics-stats-of-all.html Visit our website to check out SQL Server DBA Tutorial Step by Step http://www.techbrothersit.com/2014/12/sql-server-dba-tutorial.html
Views: 19215 TechBrothersIT