Enqueue TM Contention When Executing Online DBMS_REDEFINITION For a Table Partitioned By REFERENCE
Last updated on JANUARY 17, 2018
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2]
Information in this document applies to any platform.
Getting an enqueue contention 'enq: TM - contention' when executing this online dbms_redefinition in a table partitioned by REFERENCE.
This procedure works fine in stand alone, but when there is INSERT rows in the parent table, a lock is generated, and the new session remains waiting.
Sessions are waiting with event: "enq: TM - contention".
Using dbms_redefinition in a partition by REFERENCE table.
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