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enq: TX - contention when _lm_drm_disable is set to 2 (Doc ID 2818792.1)

Last updated on NOVEMBER 02, 2021

Applies to:

Oracle Database - Enterprise Edition - Version 19.3.0.0.0 and later
Information in this document applies to any platform.

Symptoms

On 19C RAC, "enq: TX - contention" can occur if "_lm_drm_disable" is set to 2 or any levels contains 2, such as 3, 6, 7.
the behavior can be reproduced by a test case which runs DMLs concurrently.

 

 

Changes

 "_lm_drm_disable" is set to 2 or any levels contains 2.

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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