ORA-20 reported in -MGMTDB alert log

(Doc ID 1945246.1)

Last updated on FEBRUARY 06, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


-MGMTDB is not releasing the database connection, causing it to run out of processes. -MGMTDB is the management database used for storing CHM (Cluster Health Monitor) data in 12c.

alert_-MGMTDB.log shows:

Shutdown and restart the -MGMTDB does not help, it soon reports ORA-20 again.


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