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Exadata: Database Performance Degrades when Database is in Timezone Upgrade Mode (Doc ID 1583297.1)

Last updated on JANUARY 28, 2020

Applies to:

Exadata Database Machine X2-8 - Version All Versions and later
Exadata X3-2 Hardware - Version All Versions and later
Oracle Exadata Storage Server Software - Version 11.2.2.3.0 to 11.2.3.2.1 [Release 11.2]
Oracle Exadata Hardware - Version 11.2.0.1 and later
Exadata Database Machine V2 - Version All Versions and later
Information in this document applies to any platform.

Symptoms

 Database performance suffers when database is in timezone upgrade mode.

To determine if the database is in timezone upgrade mode you might see something like:

 

Changes

Timezone was recently changed (usually to and from daylight savings time). 

Cause

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