RMAN Incremental Backup is causing Control File Enqueue Contention during tablespace backup (Doc ID 1600035.1)

Last updated on FEBRUARY 06, 2014

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Information in this document applies to any platform.

Symptoms

Performing "backup incremental from SCN ### tablespace <name> " is causing a controlfile backup to take place.

This triggers CF enqueue contention and in the case of a large number of tablespace's being backed up this may delay impact the performance of the backup routine.

Changes

Incremental backups from SCN are used in Cross platform RMAN migration and if a larger number of tablespaces are to be migrated this can delay the incremental time.

Though AUTOBACKUP of  CF (Controlfile)  is disabled, you still see CF (Controlfile) backups being taken when incremental from scn is used.

E.g.

 

 

 

Cause

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