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enq: TQ - DDL contention

Short Description

Enqueue wait. Undocumented Queue table enqueue.

Additional Information​

An enqueue is a wait for a resource held by another.

enq: TQ - DDL contention is undocumented but there are references to DataPump operations, the scheduler and AQ.

How to reduce this wait​

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Oracle Docs - Oracle Enqueue Names

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