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CDC MAP TABLE CDC$M_<CHANGE_SET_NAME> NOT PURGED BY CDC PURGE JOB (Doc ID 1499371.1)

Last updated on MARCH 07, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.2.0.3 [Release 10.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

 In an Asynchronous CDC environmnet, mapping table CDC$M_<CHANGE_SET_NAME> grows indefinitely and not purged by CDC purge job CDC$_DEFAULT_PURGE_JOB  though change table data is purged and maintained by purge job successfully.

NOTE: In the example below , user details / company name / address / email / telephone number represent a fictitious sample (based upon made up data used in the Oracle Demo Vision instance).  Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

Test Case

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Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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