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MMAN Consuming high cpu in Shared Server Configuration (Doc ID 1271774.1)

Last updated on AUGUST 01, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.1 to 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


The mman process is consuming very high cpu as seen from OS monitoring.
Database is configured for shared servers and see a drastic increase in number of connection/session attempts and shared servers.
The alert log and trace file may show messages such as "TNS:operation timed out" and "failed to start shared server".
Application users may report they cannot connect to database.


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