Degree of Parallelism in Oracle
Degree of Parallelism in Oracle
Parallel query is the most commonly used of Oracle’s parallel execution features. The optimal degree of parallelism can never be completed determined in advance with equations, it’s too dynamic, and the absolute best way is to run parallel query timings to find the optimal parallel degree. The oracle Database resource manager can be used to throttle the Number of oracle database sessions actively running on a database.
Oracle states that the optimal degree of parallelism for a query is based on several factors, but the most important is the number of processors and the layout is the disks across the platters. Oracle’s parallel execution features were enhanced by the addition of an automatic tuning feature.