Excessive Archive Log Generation with INTERNAL and COMMIT operations (Doc ID 1070861.1)

Last updated on MAY 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.2.0 [Release 9.2 to 11.2]
Information in this document applies to any platform.

Symptoms

We see high archive log generation and most of the operations are internal. Using LogMiner, we get a similar output with the one below from v$logmnr_contents:

COUNT(1) USERNAME SESSION# OPERATION SEG_OWNER SEG_NAME
1 UNKNOWN 89 DELETE SCOTT EMP
4 UNKNOWN 89 UPDATE SCOTT EMP
..
343 UNKNOWN 89 START
14517 UNKNOWN 89 INTERNAL
14737 UNKNOWN 89 COMMIT



The internal operations are ten times up to hundred times higher than the normal DML.
Also, it can be observed that the internal operation is generated together with DML on a certain table, or
several specific tables.

Changes

No important changes made in the database. This problem can occur of the sudden.

Cause

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