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Ora-01555 Caused By SELECT Statements With Low Query Duration and no Concurrent DML (Doc ID 361992.1)

Last updated on APRIL 14, 2021

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 9.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


Many ORA-1555 occur while performing only SELECT statements within the reporting database: ORA-1555 with small query duration in the message :

     ORA-01555 caused by SQL statement below (Query Duration=9 sec, SCN: 0x0001.8be5c8d1):


The PRODUCTION database is copied every night with its UNDO tablespace and renamed to REPORTING for reporting purposes .


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