How to fix the Oracle error ORA-01651: unable to extend save undo segment by string for tablespace string?

In this post, you’ll learn more about the Oracle ErrorORA-01651: unable to extend save undo segment by string for tablespace string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-01651: unable to extend save undo segment by string for tablespace string

Reason for the Error ORA-01651: unable to extend save undo segment by string for tablespace string

Failed to allocate an extent of the required number of blocks for saving undo entries for the indicated offline tablespace.

How to fix the Error ORA-01651: unable to extend save undo segment by string for tablespace string ?

You can fix this error in Oracle by following the below steps

Check the storage parameters for the SYSTEM tablespace. The tablespace needs to be brought back online so the undo can be applied.