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Excessive Undo generated in Oracle 19c Database

Hi There,


I am using Oracle 19.3 Database in Oracle Linux 7.8 environment. (Previously it was Oracle 11.2.0.1 Database and it was migrated through Data Pump in to Oracle 19.3)

However, Initially undo tablespace size was 8 GB, we found it reached the usage up to 90%. We increased at 12GB. Today we found it reached usage up to 95%. It is really took me in puzzle. Could you please help me to solve the issue by your valuable recommendations.



Regards,


Jewel

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