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ALERT: Setting RemoveIPC=yes on Redhat 7.2 Crashes ASM and Database Instances

edited Dec 10, 2015 7:30AM in Database - RAC/Scalability (MOSC)

On Redhat 7.2, systemd-logind service introduced a new feature to remove all IPC objects when a user fully logs out.
The feature is controled by the option RemoveIPC in the /etc/systemd/logind.conf configuration file,
see man logind.conf(5) for details.


The default value for RemoveIPC in RHEL7.2 is yes.

As a result, when the last oracle or grid user disconnects, the OS removes shared memory segments and semaphores for those users. 
As Oracle ASM and Databases use shared memory segments for SGA, removing shared memory segments will crash the Oracle ASM and database instances.


Please refer to the following My Oracle Support document for full details regarding this ALERT:

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