SQL Tuning Tools of the Trade

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There are several awesome tools to help you tune your SQL, and if you have a license for them you may be already using them left and right. Can you expand your SQL Tuning Toolset with some that are free and which are actually used daily by SQL Tuners on the field? This session is about some free SQL Tuning Tools that are proven to be useful, and are actually used daily by professionals doing SQL Tuning as a living. What are these tools? the list includes SQLXPLAIN (SQLT), SQL Health-Check (SQLHC) and some smaller ones like planx.sql, sqlmon.sql and sqlash.sql. When to use one or the other? At the end it becomes a matter of trade-off between amount of diagnostics they collect versus how fast you collect the bare minimum. Sometimes a small hammer does the job, and sometimes you need the big, pneumatic one. This session shows several free tools, so you can enrich your Toolset and learn when and how to use them all. If you are a Developer or a DBA in charge of SQL Tuning, then you may want to sit on this Session and learn about these free SQL Tuning tools by watching some sample outputs and live demos.

Software

SQL Tuning Tools of the Trade
Carlos Sierra

Carlos Sierra
• SQLTXPLAIN + SQL Health-Check SQLHC +
• Consultant/Developer/DBA/Design/+
• Oracle Performance + SQL Tuning
• Oracle Database Health-Check
• Tools + Scripts
• Speaker
Enkitec (c) 2014 2

SQL Tuning Tools of the Trade
• Stand-alone Scripts
• SQLHC
• SQLTXPLAIN
9/26/2014 Enkitec © 3

Commonalities
• Input one SQL statement
– SQL_ID
• Output one or more diagnostics files
– Used mainly for SQL Tuning
• Make use of some Oracle licensed features
– Diagnostics and/or Tuning Packs
9/26/2014 Enkitec © 4

Capabilities Compare
9/26/2014 Enkitec © 5
Stand-alone Scripts SQLHC SQLTXPLAIN

Footprint Compare
9/26/2014 Enkitec © 6
Stand-alone Scripts SQLHC SQLTXPLAIN

Stand-alone Scripts
• Specialized diagnostics for SQL Tuning
– planx.sql: Execution Plans from Memory and RAC
– sqlmon.sql: SQL Monitor Report
– sqlash.sql: Active Session History (ASH)
– mystat.sql: Performance Statistics (counters)
• Install nothing on the database
9/26/2014 Enkitec © 7

SQLHC
• Provides most common diagnostics needed
for SQL Tuning
• Installs nothing on the database
9/26/2014 Enkitec © 8

SQLTXPLAIN
• Provides about everything that is ever need
for SQL Tuning
– Robust set of diagnostics reports
– Automatic extraction of Test Case
• Installs two self-contained schemas
9/26/2014 Enkitec © 9

References
• Stand-alone Scripts
– carlos-sierra.net
• SQLHC
– MOS 1366133.1
• SQLTXPLAIN
– MOS 215187.1
9/26/2014 Enkitec © 11

Contact Information
• carlos.sierra@enkitec.com
• carlos-sierra.net
• @csierra_usa
Enkitec (c) 2014 12

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We know there are a few tools that can help you enhance your abilities to do SQL Tuning or diagnose your database performing poorly besides those provided by the product. Some are free and some are not. Some are good and some not quite. Some are easy to use and understand and some are not. Some of them help with the entire database while some focus on a particular SQL statement. Most of these tools fill gaps and enhance the product. Which ones are the ones we recommend and why? This session is about getting to know some free tools, that can help you improve your diagnostics collections and skills when it comes to both SQL Tuning and overall Oracle database Performance Diagnostics. The survey presented includes for the entire database: snapper, TUNAs360 and eDB360. Then for SQL Tuning: planx, sqlash, sqlmon, SQLTXPLAIN and SQLd360.

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This session introduces eDB360 - a free tool that is executed from SQL*Plus and generates a set of reports providing a 360-degree view of an Oracle database; all without installing anything on the database. If using Oracle Enterprise Manager (OEM) is off-limits for you or your team, and you can only access the database thorough a SQL*Plus connection with no direct access to the database server, then this tool is a perfect fit to provide you with a broad overview of the database configuration, performance, top SQL and much more. You only need a SQL*Plus account with read access to the data dictionary, and common Oracle licenses like the Diagnostics or the Tuning Pack. Typical uses of this eDB360 tool include: databases health-checks, performance assessments, pre or post upgrade verifications, snapshots of the environment for later use, compare between two similar environments, documenting the state of a database when taking ownership of it, etc. Once you learn how to use eDB360 and get to appreciate its value, you may want to execute this tool on all your databases on a regular basis, so you can keep track of things for long periods of time. This tool is becoming part of a large collection of goodies many DBAs use today. During this session you will learn the basics about the free eDB360 tool, plus some cool tricks. The target audience is: DBAs, developers and consultants (some managers could also benefit).

Understanding my database through SQL*Plus using the free tool eDB360

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The three fundamental steps of SQL Tuning are: 1) Diagnostics Collection; 2) Root Cause Analysis (RCA); and 3) Remediation. This introductory session on SQL Tuning is for novice DBAs and Developers that are required to investigate a piece of an application performing poorly. On this session participants will learn about producing a SQL Trace then a summary TKPROF report. A sample TKPROF is navigated with the audience, where the trivial and the no so trivial is exposed and explain. Execution Plans are also navigated and explained, so participants can later untangle complex Execution Plans and start diagnosing SQL performing badly. This session encourages participants to ask all kind of questions that could be potential road-blocks for deeper understanding of how to address a SQL performing poorly.

Understanding SQL Trace, TKPROF and Execution Plan for beginners

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Learn from the author of SQLTXPLAIN the fundamentals of SQL Tuning: 1) Diagnostics Collection; 2) Root Cause Analysis (RCA); and 3) Remediation. SQL Tuning is a complex and intimidating area of knowledge, and it requires years of frequent practice to master it. Nevertheless, there are some concepts and practices that are fundamental to succeed. From basic understanding of the Cost-based Optimizer (CBO) and the Execution Plans, to more advance topics such as Plan Stability and the caveats of using SQL Profiles and SQL Plan Baselines, this session is full of advice and experience sharing. Learn what works and what doesn't when it comes to SQL Tuning. Participants of this session will also learn about several free tools (besides SQLTXPLAIN) that can be used to diagnose a SQL statement performing poorly, and some others to improve Execution Plan Stability. Either if your are a novice DBA, or an experienced DBA or Developer, there will be something new for you on this session. And if this is your first encounter with SQL Tuning, at least you will learn the basic concepts and steps to succeed in your endeavor.

SQL Tuning 101

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You need to investigate some performance issues on an Oracle database, but you have no access to Oracle Enterprise Manager (OEM), or what is worse, not even to SQL*Plus. Where do you start? What is the first query you ask the DBA to execute for you? What is your second and third? Do you request an AWR report? For which snapshots? This scenario is not uncommon or unheard, it happens often to 3rd party consultants, or even to internal DBAs and Developers when the administration of the database has been subcontracted and access has been restricted. Performance is not the only case where you may need to reach a database and struggle with access; doing a database health-check or collecting historical performance for a capacity planning exercise may face the same issues. What you wish you had is access to a restricted SQL*Plus account, even if remote, and a toolset to collect as much information as possible from the database of interest; or to ask a DBA with access to this database to simply run this toolset and give you back all the output so you can find answers to most of your questions. eDB360 is a free tool that installs nothing on the database, executes through a SQL*Plus connection, and produces a zip file with a comprehensive report that provides a 360-degree view of an Oracle database. This session is about edb360. It covers what is included on its output, how you execute this tool, and how it can be used to gain a fair understanding of an Oracle database. This session is for DBAs, Developers and Consultants. Benefits: 1. Learn how to get a fair 360-degree view of a database 2. Gather enough database information to start a health-check 3. Learn which performance to collect for a sizing exercise

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SQL Tuning Tools of the Trade

1. SQL Tuning Tools of the Trade Carlos Sierra

2. Carlos Sierra • SQLTXPLAIN + SQL Health-Check SQLHC + • Consultant/Developer/DBA/Design/+ • Oracle Performance + SQL Tuning • Oracle Database Health-Check • Tools + Scripts • Speaker Enkitec (c) 2014 2

4. Commonalities • Input one SQL statement – SQL_ID • Output one or more diagnostics files – Used mainly for SQL Tuning • Make use of some Oracle licensed features – Diagnostics and/or Tuning Packs 9/26/2014 Enkitec © 4

7. Stand-alone Scripts • Specialized diagnostics for SQL Tuning – planx.sql: Execution Plans from Memory and RAC – sqlmon.sql: SQL Monitor Report – sqlash.sql: Active Session History (ASH) – mystat.sql: Performance Statistics (counters) • Install nothing on the database 9/26/2014 Enkitec © 7

8. SQLHC • Provides most common diagnostics needed for SQL Tuning • Installs nothing on the database 9/26/2014 Enkitec © 8

9. SQLTXPLAIN • Provides about everything that is ever need for SQL Tuning – Robust set of diagnostics reports – Automatic extraction of Test Case • Installs two self-contained schemas 9/26/2014 Enkitec © 9

11. References • Stand-alone Scripts – carlos-sierra.net • SQLHC – MOS 1366133.1 • SQLTXPLAIN – MOS 215187.1 9/26/2014 Enkitec © 11

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