How to fix the Oracle error ORA-12808: cannot set string_INSTANCES greater than number of instances string?

In this post, you’ll learn more about the Oracle ErrorORA-12808: cannot set string_INSTANCES greater than number of instances string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12808: cannot set string_INSTANCES greater than number of instances string

Reason for the Error ORA-12808: cannot set string_INSTANCES greater than number of instances string

An attempt was made to set SCAN_INSTANCES or CACHE_INSTANCES using the ALTER SYSTEM command to a value larger than the number of available instances.

How to fix the Error ORA-12808: cannot set string_INSTANCES greater than number of instances string ?

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

See the accompanying message for the current allowable maximum value, or set SCAN_INSTANCES / CACHE_INSTANCES to ALL.