Controlling the Degree of Parallelism of Queries
Hi Readers
Oracle Database 12.2 introduces a new instance parameter to control the Degree of Parallelism of queries, which involves a containers() construct.
By default, a query involving a containers() construct uses a DOP that is equal to the following value:
In the case of a query in the CDB root, the value is (1 + number of open PDBs).
In the case of a query in an application root, the value is (1 + number of open application PDBs).
If the value of this parameter is less than 65535, the value is used as the DOP for all queries involving containers():
In the session if the value was set at the session level
In the instance if the value was set at the system level
We hope the content could useful for your Oracle DBA Tasks!
This article is brought by Yunhe Enmo (Beijing) Technology Co.,LTD En.enmotech.com
Follow our Company in Linkedin: https://www.linkedin.com/company/1856106/
About the author