Contention Under Auto-Tuned Undo Retention (Doc ID 742035.1)

Last updated on JUNE 12, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.1.0.7 [Release 10.2 to 11.1]
Information in this document applies to any platform.
Applies to:


***Checked for relevance on 12-June-2017***

Symptoms

When using autotuned undo retention the high latch contention on 'latch: row cache objects' on dc_rollback_segments together with high enqueue contention on 'enq: US - contention' can occur.



Cause

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