What is Tuning?

In the context of database processing, tuning can be defined as a set of techniques that helps the database to operate more efficiently–with higher throughput.

Database tuning can be at the SQL statement level, or at the system level.

SQL Tuning

SQL Tuning is a set of techniques used to execute the SQL in the least amount of time using minimal system resources.

This would include :

  • Collecting proper statistics for the database objects
  • Use of bind variables to minimize parsing
  • Creating proper indices and/or partitions
  • Use of Hints
  • Use of SQL Profiles and Baselines
  • Careful use of parallel processing.
  • Logical optimization etc.

Database Tuning

Database tuning involves I/O and memory tuning, adjusting various parameters, techniques to reduce lock/latch contention etc. Also, the underlying OS tuning may be necessary for optimal results.

 

423 thoughts on “What is Tuning?

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