In this post, you’ll learn more about the Oracle ErrorORA-27121: unable to determine size of shared memory segment with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-27121: unable to determine size of shared memory segment
Reason for the Error ORA-27121: unable to determine size of shared memory segment
shmctl() call failed
How to fix the Error ORA-27121: unable to determine size of shared memory segment ?
You can fix this error in Oracle by following the below steps
check permissions on segment, contact Oracle support