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DGMGRL Switchover Failing with ORA-16525, DMON Terminated with ORA-07445 [_IO_vfprintf()+19065] (Doc ID 2776303.1)

Last updated on DECEMBER 30, 2021

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


NOTE: In the images and/or the document content below, the user information and environment data used represents fictitious data from the Oracle sample schema(s), Public Documentation delivered with an Oracle database product or other training material. Any similarity to actual environments, actual persons, living or dead, is purely coincidental and not intended in any manner.

For the purposes of this document, the following fictitious environment is used as an example to describe the procedure:

Primary_ora - Primary database
farsync1_ora - Far sync instance
standby1_ora - Physical standby database
standby2_ora - Physical standby database


  1. DG configuration looks good. No error.



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