Waits for 'Enq: TX - ...' Type Events - Transaction (TX) Lock Example Scenarios
(Doc ID 62354.1)
Last updated on MARCH 22, 2022
Applies to:Oracle Database - Personal Edition - Version 188.8.131.52 and later
Oracle Database - Enterprise Edition - Version 184.108.40.206 and later
Oracle Database - Standard Edition - Version 220.127.116.11 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
This document provides examples of TX locks and the waits which can occur in various circumstances. Often such waits will go unnoticed unless they are of a long duration or when they trigger a deadlock scenario (which raises an ORA-60 error).
The examples here demonstrate fundamental locking scenarios which should be understood by application developers and DBA's alike.
The examples require select privilege on the V$ views.
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