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plsql_optimize_level Tips

Oracle Tips by Burleson

Oracle 10g plsql_optimize_level

Parameter type – Integer

Default value – 2

Modifiable – ALTER SESSION, ALTER SYSTEM

Range of values – 1 | 2

  • plsql_optimize_level – This specifies the optimization level that will be used to compile PL/SQL library units. The higher the setting of this parameter, the more effort the compiler makes to optimize PL/SQL library units.

Generally, setting this parameter to 2 pays off in better execution performance. Sometimes, however, the compiler runs slowly on a particular source module or optimization does not make sense for some reason (e.g., during rapid turnaround development). In such cases, setting this parameter to 1 will result in almost as optimal a compilation with less use of compile-time resources.

The value of this parameter is stored persistently with the library unit.

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