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Myth busters - performance tuning 102 2008

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4 June 2008 MythBusters - performance tuning 102 Paul Guerin Bachelor of Engineering (Computer) Oracle DBA Certified Professional DBA 10+ years Employers: Origin Energy, Bluescope Steel, BHP Billiton
Why is application performance important? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Topics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fundamentals of application performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cost Based Optimiser ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cost Based Optimiser statistics ,[object Object],[object Object],[object Object],[object Object],[object Object]
Cost Based Optimiser statistics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cost Based Optimiser statistics ,[object Object],[object Object]
Column constraints ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Indexes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SQL tuning tips ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SQL tuning tips – EXISTS or IN subqueries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SQL tuning tips – joins or subqueries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SQL tuning tips – multitable transactions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Non-SQL performance issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Non-SQL performance issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Non-SQL performance issues - UNDO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Processing ,[object Object],[object Object],[object Object]
Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Processing ,[object Object],[object Object],[object Object]
Data migrations ,[object Object],[object Object],[object Object],[object Object]
Data migrations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data migrations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Use column constraints. e.g. primary key, foreign key, not null, etc. Statistics are not the “silver bullet” for all performance problems. Prefer to process jobs serially for the same table. Consult the DBAs Summary:
Analytic functions? Partitions and pruning? More fundamental SQL tuning? More subqueries? Using export & import utilities? Target a smaller audience? Currently accepting requests Possible topics for future forums:

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Myth busters - performance tuning 102 2008

  • 1. 4 June 2008 MythBusters - performance tuning 102 Paul Guerin Bachelor of Engineering (Computer) Oracle DBA Certified Professional DBA 10+ years Employers: Origin Energy, Bluescope Steel, BHP Billiton
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  • 25. Use column constraints. e.g. primary key, foreign key, not null, etc. Statistics are not the “silver bullet” for all performance problems. Prefer to process jobs serially for the same table. Consult the DBAs Summary:
  • 26. Analytic functions? Partitions and pruning? More fundamental SQL tuning? More subqueries? Using export & import utilities? Target a smaller audience? Currently accepting requests Possible topics for future forums: