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When taking a backup with Expdp, it can be terminated with ORA-31693, ORA-02354 and ORA-01555 errors when it comes to a table with a lob …
Read More »Tag Archives: UNDO_RETENTION
Undo Advisor(OEM)
You can use Undo Advisor to set UNDO_RETENTION and the required undo tablespace size. You can open the Undo Advisor using the Database-> Diagnose-> …
Read More »ORA-01555 Snapshot Too Old / ORA-30036: unable to extend segment by string in undo tablespace
ORA-01555 Snapshot Too Old The “ORA-01555 Snapshot Too Old” error usually comes in long-running queries. In Oracle, previous changes of the data are retained in …
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