2026-03-12 20:23:15

timhall/monitoring/large_lob_segments.sql

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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