Querying DBA_EXTENTS For Size Of A Table With LOB Columns Does not Provide Actual Size Of Table (Doc ID 738708.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 8.1.7.4 to 10.2.0.4 [Release 8.1.7 to 10.2]
Information in this document applies to any platform.
Information in this document applies to any platform.

Goal

Running the following query on a table with LOB columns does not provide the actual size of the table.

select sum(bytes/1024/1024) from dba_extents where segment_name='<Table Name>';

Solution

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms