UNDOTBS1

How to Resolve ORA-30012: undo tablespace does not exist or of wrong type

by Ed Chen
November 11, 2022March 20, 2023

ORA-30012 Tried to restart a normal, typical database after changing the default undo tablespace, but it failed with ORA-30012. SQL> startup ORACLE instance started. ...… Read More »

PDB Local Undo for Each RAC Instance

by Ed Chen
June 16, 2021August 18, 2023

There're 2 cases that makes problems about local UNDO tablespace in a RAC database. Newly Created PDB Open Activated PDB Newly Created PDB Usually, we… Read More »

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