Error:
ORA-31693: Table data object "MIS"."MASTER_MISDB" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 4 with name "_SYSSMU4_4250244621$" too small
[oracle@said]$ sqlplus
SQL*Plus: Release 12.1.0.2.0 Production on Mon Nov 26 10:15:18 2018
Copyright (c) 1982, 2014, Oracle. All rights reserved.
Enter user-name: /as sysdba
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL> show parameter undo
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
temp_undo_enabled boolean FALSE
undo_management string AUTO
undo_retention integer 7200
undo_tablespace string UNDOTBS1
SQL>
SQL> select max(maxquerylen) from v$undostat;
MAX(MAXQUERYLEN)
----------------
204662
Solution:
1. Modify the current UNDO_RETENTION for the database:
SQL> ALTER SYSTEM SET UNDO_RETENTION = 205000 scope=both sid='*';
SQL> show parameter undo
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
temp_undo_enabled boolean FALSE
undo_management string AUTO
undo_retention integer 205000
undo_tablespace string UNDOTBS1
2. Perform the export again.
