Toad as a SQL Tuning Tool. With Dan Hotka - Oracle ACE Director
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1 Toad as a SQL Tuning Tool With Dan Hotka - Oracle ACE Director
2 Dan Hotka Oracle ACE Director Training Consultant Published author Training Courses Include: Oracle Advanced PL/SQL Oracle SQL Tuning TOAD Courses Unix/Linux, OBIEE, Discoverer, Intro courses, Cross training! Learn more at: Follow Dan on 2
3 Lecture Agenda 3
4 Application Performance Tips and Techniques - with Oracle ACE Dan Hotka Understanding Explain Plans Using Toad as a SQL Tuning Tool Working with Indexes- Part 1 Working with Indexes- Part 2 See Dell Website for Replay TODAY September 12PM EDT October 12PM EDT Register on: software.dell.com/danhotka 4
5 Today s Agenda Toad Explain Plan Review Toad and SQL Trace Toad SQL Optimizer 5
6 Lecture Database This Lecture uses: A, C (1000 rows) B (100 rows) Master (60,000+ rows) Managers (2,895 rows) Teams (2,327) 6
7 Toad Explain Plan Review 7
8 Toad - best in class database solutions Leadership position #1 for database development 2M+ installations, 58,000+ customers De-facto standard for database tools Maximize resources Improve database performance Increase productivity with automation and simplified workflows Support for over 10 database platforms 4M+ community Online community with a huge knowledge base 3M+ unique visitors to ToadWorld annually Database experts to answer questions Dell is the largest independent database tools provider worldwide.
9 Using the Tools All tools use the PLAN_TABLE Oracle9i and before: <oracle_home>/rdbms/admin/utlxplan.sql Oracle10g+ Automatically Created PLAN_TABLE$ Public Synonym to PLAN_TABLE Oracle11+ synonym has been created IF autotrace or Explain Plan For complains create public synonym under SYS 9
10 Using TOAD TOAD Product of Dell Software Solutions Purchased product Trial versions available Used to be freeware/shareware Been around since Oracle7 Nice SQL tuning features 10
11 11 Rt Click
12 12
13 13
14 14
15 Toad and SQL Trace 15
16 Using SQLTrace SQL Trace/10046 Trace Free from Oracle Corp Been around since Oracle7 Used to be the only way to get actual explain plans for SQL Useful statistics More or less replaced by Oracle10 DBMS_XPLAN technologies Needs permissions to run and retrieve trace file output 16
17 SQL trace SQL TRACE tool generates a raw trace file (*.trc) that contains info about SQL statements File created with adjustable default format in USER_DUMP_DEST Creates a simple Enable SQL Execution Trace Trace Level 12 includes all available information SQL Stats Bind variables Wait events 17
18 SQL trace Commands: For your session: alter session set events '10046 trace name context forever,level 12'; alter session set events '10046 trace name context off'; For a DIFFERENT session: Execute DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE (session_id => 27, serial_num => 60, waits => TRUE, binds => TRUE); Execute DBMS_MONITOR.CLIENT_ID_TRACE_DISABLE (session_id => 27, serial_num => 60); 18
19 SQL Trace Commands (continued) Session level: Alter session set tracefile_identifier = xxx ; Trace file name: <OracleSID>_ora_<pid>.trc OracleSID is the name given to the Oracle database at installation time Pid is your process ID can be found in V$Session 19
20 SQL Trace and Toad Start/Stop trace via TOAD can easily Examine trace output does prompt when Stopping trace Requires permissions 20
21 Toad and SQL Trace 21
22 SQL Trace Use TKPROF utility to produce a formatted output Formatted file contains: Parse, execute,and fetch counts Parse: SQL Syntax & Execution Plan Execute: Modifies data on INSERT, UPDATE, DELETE Identifies rows for SELECT Fetch: Retrieves rows for SELECT CPU time to process Elapsed time to execute Read info: Disk: Physical block reads Query: Consistent Logical Block Reads Current: Logical block Reads 22
23 23
24 Running TKProf TOAD 24
25 Running TKProf 25
26 TOAD and Trace Files Oraxp11r1_ora_Level12.trc 26
27 27
28 28
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30 30
31 Toad SQL Optimizer 31
32 TOAD SQL Optimizer Part of Dell Software SQL Optimizer Only works with current SQL Editor SQL Does SQL Rewrite/Tries various Hints Searches for alternatives Dell SQL Optimizer Separate purchased item Does more analysis Can try indexing options with impact analysis Can do: SQL rewrite (ie: this tool) Plan Control (base lines discussed in advanced class) Batch Optimization finds SQL in database code/external code 32
33 33
34 34
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36 Use Toad World Your One-Stop Resource for Education, Expertise and Collaboration In this free online community, you ll find: Exclusive freeware downloads Direct access to Toad experts User forums Toad tips and tricks videos Toad news, events and more 36
37 Questions Contact: Dan Hotka Oracle ACE Director 37
38 Thank you!
39
Dan Hotka Author/Instructor Oracle Ace Director.
Dan Hotka Author/Instructor Oracle Ace Director , LLC (c) www.danhotka.com LLC. Any reproduction or copying of this manual without the express written consent of www.danhotka.com LLC is expressly prohibited.
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