Ora-27103 Internal Error Svr4 Error 11 Resource Temporarily -
At first glance, this message seems to point to an “internal error,” which might suggest a bug in Oracle. However, more often than not, the root cause lies in the operating system’s inability to allocate necessary resources to the Oracle process.
Introduction If you are an Oracle Database Administrator (DBA) working on Unix/Linux-based systems (Solaris, AIX, Linux), you might occasionally encounter the cryptic error: Ora-27103 Internal Error Svr4 Error 11 Resource Temporarily
ORA-27300: OS system dependent operation:fork failed with status: 11 ORA-27301: OS failure message: Resource temporarily unavailable ORA-27302: failure occurred at: skgpspawn3 This confirms the OS failed to fork a new process. Run: At first glance, this message seems to point
Set kernel.sem = 1500 32000 100 512 in sysctl.conf. The database started immediately. Conclusion The ORA-27103: internal error, svr4 error 11, resource temporarily unavailable is intimidating but almost never an Oracle code bug. It is the OS’s polite way of saying, “I’m too busy or too constrained to give you another resource right now.” Run: Set kernel
cat /proc/sys/kernel/sem # Output: 250 32000 100 128 # Fields: SEMMSL, SEMMNS, SEMOPM, SEMMNI Increase SEMMNI or SEMMSL via sysctl if needed. Switch to the Oracle user and run:
ALTER SYSTEM SET processes=800 SCOPE=SPFILE; Then restart. Check MyOracleSupport for known bugs matching your version (e.g., Bug 9854529 for Solaris 10). Case Study: A Real-World Example Symptom: After increasing the SGA from 8GB to 16GB, the database failed to start with ORA-27103.
