Ora-27103 Internal Error Svr4 Error 11 Resource Temporarily Unavailable Apr 2026

# Current limits cat /proc/sys/kernel/shmmax cat /proc/sys/kernel/shmall Set for large SGA:

# Current semaphore limits (SEMMSL, SEMMNS, SEMOPM, SEMMNI) ipcs -ls | grep "max number of arrays" cat /proc/sys/kernel/sem Recommended for Oracle:

set semsys:seminfo_semmns=4096 set semsys:seminfo_semmni=1024 set semsys:seminfo_semmsl=512 (if instance is down):

oracle soft nproc 16384 oracle hard nproc 32768 oracle soft nofile 65536 oracle hard nofile 65536 in /etc/system :

echo "kernel.sem = 250 32000 100 256" >> /etc/sysctl.conf sysctl -p in /etc/system :

SEMMSL = 250 (or max processes per instance) SEMMNS = 32000 (or higher) SEMOPM = 100 SEMMNI = 256 (or 1024 for large systems) Set persistently: