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Myth busters - performance tuning 103 2008

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The document discusses various sources of waste and performance issues in the NETS database, along with improvements made over two years to address these issues. Key sources of waste included unused indexes, inefficient index placement, sparse table blocks from nologging inserts, and excessive temporary work areas from sorting. Improvements such as SQL tuning, rebuilds to increase block density, and compressed objects helped reduce waste and contention for storage and processing resources. Ongoing efforts aim to further optimize reliability, capacity planning, disaster recovery, and workload processing.

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December 2008 MythBusters - performance tuning 103 Paul Guerin Bachelor of Engineering (Computer) Oracle DBA Certified Professional DBA 10+ years Employers: Origin Energy, Bluescope Steel, BHP Billiton
Topics ,[object Object],[object Object]
How data is stored ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Waste from Indexes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Waste from Indexes ,[object Object],[object Object],[object Object],[object Object],[object Object]
Waste from Indexes ,[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],[object Object],[object Object],[object Object]
Waste from nologging inserts ,[object Object],[object Object],[object Object],[object Object]
Waste from nologging inserts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Methods to delete everything from a table ,[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],[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],[object Object],[object Object],[object Object],[object Object]
Waste from statement 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]
Waste from excessively large workareas ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reclaiming waste ,[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]
Reclaiming waste ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Contention for capacity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Contention related myths ,[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]
Good database practices….. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[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]
Operational improvements on NETS ,[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]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[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]
Operational improvements on NETS ,[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]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operational improvements on NETS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Summary: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Myth busters - performance tuning 103 2008

  • 1. December 2008 MythBusters - performance tuning 103 Paul Guerin Bachelor of Engineering (Computer) Oracle DBA Certified Professional DBA 10+ years Employers: Origin Energy, Bluescope Steel, BHP Billiton
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  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.