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Oracle10g Grid Computing with RAC
Chapter 12 - RAC Design Considerations

Designing for High Performance

Of course, the difference is that now partitioning is based on reducing intra-node block pinging  between instances over the cluster interconnects, instead of reducing disk pinging. At most, we can expect a factor of 40 improvements for the same application running on a RAC server, versus an OPS-based server. Once the various system latencies are added, the speed difference between memory operations and disk operations falls to approximately a factor of 40 between a disk ping and an intra-node memory ping. The speed is dependent upon the speed of the interconnect. Still, a factor of 4000% (40) is nothing to sneeze at.

  • Designing applications for better performance on RAC involves:

  • Assigning transactions with similar data access characteristics to specific nodes.

  • Creating data objects with parameters that enable more efficient access when globally shared.

  • Automating free space allocation and de-allocation (use of locally managed tablespaces.

  • Automating block management (local freelist management).

  • Using sequences properly (using sequence ranging triggers for each instance).

  • Optimizing all SQL in the application.

For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.

Remote DBA Services

Burleson Consulting can offer world-class remote Oracle database support at super-affordable prices.

Our remote Oracle DBA service provides 100% of the remote Oracle database administration needs for your company, and includes 24x7 access to our staff of 100% OCP Certified Oracle DBAs. 

We require a 12 month service commitment and include the following services:

  • Initial configuration review and problem identification
  • Installation of Oracle statistics collection mechanisms and quarterly database growth summaries
  • Hourly monitoring of your Oracle database for pending problems
  • Periodic performance analysis & identification of tuning activities
  • Twenty Four hour Oracle emergency support
  • Reporting and resolving all serious Oracle alert log messages
  • Free use of the BC TablePack, ServerPack and AuditPack services
  • Quick response emergency support for production database outages
  • Four hours of free remote DBA support every month. You can use these free hours for any DBA activity, including database analysis, system design, production migrations or personal mentoring.

For more information, please visit


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