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Handling ORL and SRL (Resize) on Primary and Physical Standby in Data Guard Environment (Doc ID 1532566.1)

Last updated on AUGUST 19, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A 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 Database: prm11203
Standby Database: std11203


It has been seen in cases where ORA-16401 and ORA-16055 reported in primary alert log when redo log switch is over frequently. So suggestion is to Increase the Size of the Online Redologs to reduce Redolog Switch Frequency. And this may also required to improve primary database performance.

So the purpose of this article is How to Increase size of Redo Logs in a Dataguard Environment when Physical Standby in place.



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