Switch to the Oracle software owner:
The Oracle database error accompanied by SVR4 Error: 11: Resource temporarily unavailable (or its Linux equivalent Linux-x86_64 Error: 11: Resource temporarily unavailable ) stops database operations immediately. The Memory Manager ( MMAN ) or Process Monitor ( PMON ) background processes usually trigger this error, which abruptly terminates the database instance.
Ensure shmmax is at least as large as your SGA.