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ORA-1555 - UNDO_RETENTION is silently ignored if the LOB resides in a MSSM tablespace (Doc ID 800386.1)

Last updated on FEBRUARY 17, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 9.0.1.0 to 11.2.0.0 [Release 9.0.1 to 11.2]
Information in this document applies to any platform.

This problem can occur on any platform.

Symptoms

This may occur when LOB column resides in a MSSM (Manual Segment Space Management) tablespace.

-- Verify Segment Management

select tablespace_name, extent_management,  segment_space_management
from dba_tablespaces
where tablespace_name in
  (select tablespace_name from dba_segments
   where owner='TEST' and segment_name='TAB1');

TABLESPACE_NAME                EXTENT_MAN SEGMEN
------------------------------ ---------- ------
TESTCASE                            LOCAL MANUAL <== 
 

-- Verify LOB retention parameter
select column_name, pctversion, retention
from dba_lobs
where owner = 'TEST' and table_name ='TAB1';

COLUMN_NAME   PCTVERSION  RETENTION
------------- ---------- ----------
DATA                          86400 <==

 

Changes

LOB column is stored on MSSM tablespace.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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