sql tuning made much easier with sqltxplain sqlt v0

7/30/2019 SQL Tuning Made Much Easier With Sqltxplain Sqlt v0

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Copyright 2013, Oracle and/or its affiliates.1


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SQL Tuning made much easierwith SQLTXPLAIN (SQLT)

Carlos SierraConsulting Technical Advisor

Center of Expertise (CoE)


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Carlos Sierra

SQL Tuner handyman: developer, advisor, trainer, supp

IT: Oracle(17), UNISYS(12), Ford(3), others(3)

Florida(17), Venezuela(3), Puerto Rico(6), Michigan(1),

Tools: SQLTXPLAIN(SQLT), SQLHC, TRCANLZR(TRC

Motto: Life is good!

Oracle Server Technologies(ST) Center of Expertise(CoE)


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Agenda

Introduction

Installation

Main methods

XTRACT, XECUTE and XTRXEC

XTRSBY and XPLAIN

XPREXT and XPREXC

Main HTML diagnostics report

SQL Tuning made much easier with SQLTXPLAIN (SQLT)


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SQLTXPLAIN (SQLT)Introduction


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What is SQLTXPLAIN (SQLT)?

Add-on (MOS 215187.1) 11g/10g

Linux, UNIX, Windows

Single instance, RAC, Exadata

Easy to install and execute

download and use

Tool to diagnose SQL statements performing poorly


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SQLTXPLAIN (SQLT) benefits

Collect SQL tuning diagnostics for one SQL statement Over a hundred health-checks (HC) around the SQL sta

If Oracle Tuning or Diagnostics Pack are properly licens

Invokes SQL Tuning Advisor (STA)

Includes Active Session History (ASH) and SQL Monitor R

Includes Automatic Workload Repository (AWR)

Automatic SQL tuning test case (TC) extraction

SQLT helps to expedite SQL tuning process

What is in it for me?


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SQLTXPLAIN (SQLT) mechanics

3 + 4 main methods to analyze one SQL statement

Inputs one SQL statement and outputs one zip file

Output contains a main html report and other files

AWR, ADDM, ASH, 10053, 10046, TKPROF, etc.

Exports SQL tuning test cases SQLT TC and TCX

11g Test Case Builder (TCB)

SQLT installs its own two schemas and objects on th

How does it work?


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SQLT Installation


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How do I install SQLT?

Download tool (sqlt.zip file)

Unzip into database server

Execute sqlt/install/sqcreate.sql

connected as SYS

Input installation parameters

My Oracle Support (MOS) 215187.1


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SQLT Installation Parameters

Optional Connect Identifier

Password for user SQLTXP

Default Tablespace

Temporary Tablespace

Main application user of SQ Oracle Pack license [ T | D

Provided inline or when aske


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How do you know Installation succeed


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How do I uninstall SQLT

Execute sqlt/install/sqdrop.sql connected as SYS

In case you no longer need SQLT


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SQLT Main Methods


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SQLT Main Methods

SQLT XTRACT

SQLT XECUTE

SQLT XTRXEC

SQLT XPLAIN

SQLT XTRSBY SQLT XPREXT

SQLT XPREXC

All 3 + 2 + 2 act on one SQL statement

All methods have these requirements

SQL*Plus connecting as application user

Application user must have SQLT_USER_

Password for SQLTXPLAIN must be prov

One SQL per use of SQLT

SQLT has its own configuration paramete


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Using SQLT Main Methods

Method Script Features

SQLTXTRACT sqlt/run/sqltxtract.sql Most common methodInputs SQL_ID

SQL statement is not executed

SQLTXECUTE sqlt/run/sqltxecute.sql Inputs a script name which containsALTER SESSION commands (if applicabl

Binds declaration and assignment (if appli

SQL statement

Executes the SQL statement

SQLT XTRXEC sqlt/run/sqltxtrxecsql Combines XTRACT and XECUTEInputs SQL_ID

SQLT XPLAIN sqlt/run/sqltxplain.sql

Inputs a file name which contains a SQL statemeWhat if SQL contains binds?

Leave them in place, OR Replace with literals of s

SQLT XTRSBY sqlt/run/sqltxtrsby.sql For read-only databasesExecutes in Primary and connects into stand-by

Works like XTRACT

Inputs SQL_ID and DBLINK


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XTRXEC includes

XTRACT and XECUTE

XPLAIN

XTRSBY

CommonXTRACT

XECUTE

SQLT Output Overlap


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SQLT Main HTML

Diagnostics Report


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What is included in Main Report?

Health-checks SQL text

Parameters

Cursor sharing

SQL Tuning Advisor (STA) report Execution plans

Partial list of contents (1/3)


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Plan stabilityActive Session History (ASH)

SQL performance metrics

SQL Monitor

Segment and session statistics Tables



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Indexes CBO statistics

Objects and dependencies

Policies

Metadata



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Navigating the SQLT Main Report

1. SQL Text2. Plans Summary

3. Observations

4. Branch as per findings

Typical Navigation


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Demonstration

Main Report Navigation

SQLT XTRACT SQLT XECUTE


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Sum


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SQL Tuning made easier with SQLTXPLAIN

Full collection of SQL tuning diagnostics

Consolidated into an easy-to-navigate html report

Consistent view

Allow offline expert analysis

Over a hundred health-checks around the SQL statemen

Some with pointers to particular notes or bugs

Automatic SQL tuning test case (TC) extraction

Allow WHAT-IF evaluations on a test environment

Dynamic readme with commands for further diagnostics

How is that?

W t t t SQLTXPLAIN?


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Want to master SQLTXPLAIN?

Book: Oracle SQL Tuning with Oracle SQLTXPLAIN

Author: Stelios Charalambides Released: March 20, 2013

Level: Intermediate

Available

ApressAmazon

Barnes&Noble

E t t SQL T i ?


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Eager to master SQL Tuning?

Jonathan Lewis Maria Colgan

Tom Kyte

Wolfgang Breitling

Cary Millsap

Christian Antognini

Guy Harrison

Karen Morton

Some SQL Tuning Gurus (Google them!)

M O l S t N t d C t t


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My Oracle Support Notes and Contact

215187.1 SQLTXPLAIN (SQLT) Tool Download 1454160.1 SQLTXPLAIN (SQLT) FAQ

MOS (Metalink) Notes

carlos.sierra@ora

http://carlos-sierra

@csierra_usa


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sql tuning made much easier with sqltxplain sqlt v0

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