Oracle Large LOB Segments Report
This script displays the size of large LOB (Large Object) segments in the database. It joins DBA_LOBS and DBA_SEGMENTS to show owner, table, column, segment name, tablespace, and size in MB, helping DBAs identify large LOB storage consumers.
oraclesqlstorage-tablespacesv1.0.0
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-- -----------------------------------------------------------------------------------
-- File Name : https://oracle-base.com/dba/monitoring/large_lob_segments.sql
-- Author : Tim Hall
-- Description : Displays size of large LOB segments.
-- Requirements : Access to the DBA views.
-- Call Syntax : @large_lob_segments (rows)
-- Last Modified: 12/09/2017
-- -----------------------------------------------------------------------------------
SET LINESIZE 500 VERIFY OFF
COLUMN owner FORMAT A30
COLUMN table_name FORMAT A30
COLUMN column_name FORMAT A30
COLUMN segment_name FORMAT A30
COLUMN tablespace_name FORMAT A30
COLUMN size_mb FORMAT 99999999.00
SELECT *
FROM (SELECT l.owner,
l.table_name,
l.column_name,
l.segment_name,
l.tablespace_name,
ROUND(s.bytes/1024/1024,2) size_mb
FROM dba_lobs l
JOIN dba_segments s ON s.owner = l.owner AND s.segment_name = l.segment_name
ORDER BY 6 DESC)
WHERE ROWNUM <= &1;
SET VERIFY ON