AWR report shows "Disk File Mirror Read" in the Top 5 Timed Foreground Events

(Doc ID 1913253.1)

Last updated on AUGUST 04, 2014

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2 to 12.1]
Information in this document applies to any platform.


The "Disk file Mirror Read" waits are observed in the Top 5 Timed Foreground Events section of the AWR report, like this:








To see this symptom all of the following must be true:



 There was a code change to do with the mirrored controlfiles, that results in the increased wait count of the "Disk file Mirror Read" event.


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