MMAN Consuming high cpu in Shared Server Configuration

(Doc ID 1271774.1)

Last updated on SEPTEMBER 07, 2017

Applies to:

Oracle Server - Enterprise Edition - Version: to - Release: 10.1 to 11.1
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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