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

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

echo 65536 > /proc/sys/kernel/pid_max # temporary echo "kernel.pid_max=65536" >> /etc/sysctl.conf Check for zombie processes: Check free memory : set maxuprc=16384

SELECT value/1024/1024 MB FROM v$parameter WHERE name='sga_max_size'; Check free memory : Check free memory : set maxuprc=16384

set maxuprc=16384 , then verify: