How to fix the Oracle error ORA-02899: smscre: Cannot create SGA with Extended Shared Memory feature?

In this post, you’ll learn more about the Oracle ErrorORA-02899: smscre: Cannot create SGA with Extended Shared Memory feature with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-02899: smscre: Cannot create SGA with Extended Shared Memory feature

Reason for the Error ORA-02899: smscre: Cannot create SGA with Extended Shared Memory feature

The environment variable EXTSHM was set before starting oracle.

How to fix the Error ORA-02899: smscre: Cannot create SGA with Extended Shared Memory feature ?

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

Unset the environment variable EXTSHM and startup oracle.