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

echo 65536 > /proc/sys/kernel/pid_max # temporary echo "kernel.pid_max=65536" >> /etc/sysctl.conf

The most common cause is that the oracle user has reached its maximum number of allowed processes or threads ( nproc ).

Then recreate spfile after kernel tuning.

oracle soft nproc 16384 oracle hard nproc 32768 oracle soft nofile 65536 oracle hard nofile 65536

For further reading, consult the Oracle Support note (ORA-27103 Troubleshooting) and your UNIX vendor’s System V IPC documentation.

cat /proc/sys/kernel/shmall