Skip Headers

Oracle® Database Reference
10g Release 1 (10.1)

Part Number B10755-01
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Feedback

Go to previous page
Previous
Go to next page
Next
View PDF

PARALLEL_ADAPTIVE_MULTI_USER

Property Description
Parameter type Boolean
Default value true
Modifiable ALTER SYSTEM
Range of values true | false

PARALLEL_ADAPTIVE_MULTI_USER, when set to true, enables an adaptive algorithm designed to improve performance in multiuser environments that use parallel execution. The algorithm automatically reduces the requested degree of parallelism based on the system load at query startup time. The effective degree of parallelism is based on the default degree of parallelism, or the degree from the table or hints, divided by a reduction factor.

The algorithm assumes the following:

Tables and hints use the default degree of parallelism.


See Also:

Oracle Database Performance Tuning Guide for more information on tuning parallel execution and on the algorithm described here