RHEL 7.2: The default RemoveIPC setting crashes asm, databases, and any application that uses a Shared Memory Segment (SHM)
(Doc ID 2082270.1)
Last updated on JUNE 01, 2020
Applies to:Linux OS - Version Oracle Linux 7.2 to Oracle Linux 7.2 [Release OL7U2]
Oracle Cloud Infrastructure - Version N/A and later
Applicable only for RHEL 7.2
The default setting for RemoveIPC is set to YES with RHEL 7.2 Server. As a result, when the last oracle user or grid user disconnects from an active session, the OS removes shared memory segments for those users. This removal of shared memory segments crashes ASM and RAC databases as these products use shared memory segments for SGA.
This problem affects all applications including Oracle RAC databases that use shared memory segments. So, both RAC ASM and RAC databases are affected.
1) Installing 11.2 and 12c GI/CRS fails because ASM crashes toward the end of the installation.
2) Upgrading to 11.2 and 12c GI/CRS fails.
3) After Redhat Linux is upgraded to Redhat 7.2, 11.2 and 12c ASM and RAC databases crash.
Below is the Observed error found in the /var/log/messages file when asm or database instance crashed:
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