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Partitioned Indexes Created With 8M Initial Extent (Doc ID 1989311.1)

Last updated on FEBRUARY 27, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
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 Backup Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Segments of type INDEX PARTITION or INDEX SUBPARTITION will be created with 8M initial extent in version 12.1.0.2, instead of 64K in earlier versions. Global indexes or indexes on non partitioned tables still have 64K.

If you create the index before the insert statement, the segment size is only 64K.

Issue can be easily reproduced on 12.1.0.2.0.

==64K are allocated in the situation the index is created when no rows are in the table:

  

Changes

Upgrade to version 12.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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