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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 JULY 02, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.7 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 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.

Symptoms


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):

Changes

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

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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