RMAN Incremental backup size suddenly increases in spite of few updates (Doc ID 1206223.1)

Last updated on OCTOBER 27, 2016

Applies to:

Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 11.2.0.2 - Release: 9.2 to 11.2
Information in this document applies to any platform.

Symptoms

Incremental backup cycle:

Sundays:        Level 0
Monday-Sat:  cumulative level 1

Every Friday and Saturday, the time for the incremental level 1 backup suddenly increases and results in a much larger backuppiece being generated.  The usual backuppiece size is around 200 MB, but on Friday and Saturday it is around 800 MB despite the fact that there is no extra activity on thedatabase during these days. The archive log generation is the same as on previous days.


Cause

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