Thanks for the question, Mustapha.

Asked: July 01, 2016 - 4:28 am UTC

Last updated: July 01, 2016 - 6:18 am UTC

Version: 12C

Viewed 10K+ times! This question is

You Asked

Have an error when trying to start DB - ORA-27125: unable to create shared memory segment SVR4 Error: 22: Invalid argument

and Connor said...

Basically we tried to get some shared memory, and we could not.

Hence lots of *possible* causes:

- not enough memory
- not enough memory configured to allow shared use
- permissions issue for database OS user
- incorrect setting of lock_sga
etc

Normally there will be some addition information in the alert log to help narrow it down. But basically its a case of double checking the installation prerequisites for your platform, and making sure you've done all of them.

Hope this helps.

Rating

(1 rating)

Is this answer out of date? If it is, please let us know via a Comment

Comments

Or ...

cd, July 01, 2016 - 8:50 am UTC

It could be as simple as a problem in the environment configuration (wrong SID, ...), which I also encountered in the past when starting an instance.

Live SQL

Share and learn SQL and PL/SQL; free access to the latest version of Oracle Database!

Dev Gym

Classes, workouts and quizzes on Oracle Database technologies. Expertise through exercise!

Breadcrumb

Question and Answer