CDC Apply Latency / High CPU from Apply Servers / High Version Count Re Inserts into CDC tables
(Doc ID 862971.1)
Last updated on APRIL 09, 2020
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.4 to 126.96.36.199 [Release 10.2 to 11.1]
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 19-March-2013***
Change Data Capture.
Latency in the Apply process associated with CDC server activity.
High version count associated with insert statements into CDC tables .
Higher than usual CPU from Apply servers performing inserts into CDC tables.
sql_text like 'INSERT INTO%OPERATION$, CSCN$, COMMIT_TIMESTAMP$%' and
sum(version_count) > 10;
Shows high version counts relating to insert statements into CDC tables.
correct for your environment. The above attempts to isolate all inserts into CDC tables.
This issue has also been linked to ora-1722 errors and CDC operation.
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In this Document