How to fix the Oracle error ORA-12821: invalid value for INSTANCES?

In this post, you’ll learn more about the Oracle ErrorORA-12821: invalid value for INSTANCES with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12821: invalid value for INSTANCES

Reason for the Error ORA-12821: invalid value for INSTANCES

invalid value for INSTANCES was specified within a PARALLEL clause.

How to fix the Error ORA-12821: invalid value for INSTANCES ?

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

specify a positive integer or DEFAULT for the INSTANCES option within a PARALLEL clause.