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How to Clear Down the Deferred Queue and DBMS_DEFER_SYS.DELETE_TRAN (Doc ID 190885.1)

Last updated on JULY 16, 2021

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 7.3.4 to 12.1]
Information in this document applies to any platform.


The purpose of this bulletin is to assist support analysts in manually clearing down the deferred transaction queue. The steps described should be used after considering their possible side effects, and as a last resort.


1. Clearing the Deferred Transaction Queue

1.1. Version 7.X: Truncating Deftran Base tables
1.2. Versions 8.X.X - 11.X: Truncating Deftran Base tables
1.3. Special cases that require Deftran Truncation

2. Ramifications of this Truncate Procedure

2.1. Need for Synchronizing Data
2.2. High Watermark Problems


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