Partitioned Indexes Created With 8M Initial Extent

(Doc ID 1989311.1)

Last updated on DECEMBER 18, 2015

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


Segments of type INDEX PARTITION or INDEX SUBPARTITION will be created with 8M initial extent in version, 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

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



Upgrade to version 12.


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