Articles & Content
Topic: 2009 NA
Subtopic: DB2 for LUW
DATE: 2009-5-13 (11:00 AM - 12:00 PM)
SPEAKERS: Martin Hubel (Martin Hubel Consulting, Inc.)
As applications grow, buffer pools play an increasingly important part in reducing physical I/O, elapsed time and CPU time. Many organizations have not spent time to optimize this valuable resource.The presenter will talk of his experiences in tuning buffer pools for large applications including production applications and data warehouses at client sites. Measurements, formulas and guidelines will be given.
EXP. LEVEL: Beginner
The benefits of buffer pool tuning- The need for tuning- A quantitative look at the benefits- Common mistakes and myths
Types of I/O- Random I/O- Sequential prefetch- List and dynamic prefetch- Block-based buffer pools- Data and index hit ratios
Number of buffer pools and object placement- Number and sizing of buffer pools- Table and indexes- Code and dimension tables- Placing very large objects
4.Measuring buffer pool performance- Buffer pool effectiveness formulas- Monitoring considerations- Tuning scenarios
5.Related tuning opportunities- Index design to reduce I/O- Data compression- Database reorganization
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