Ora-27103 Internal — Error Svr4 Error 11 Resource Temporarily Portable

In plain terms: An Oracle background process (e.g., PMON, SMON, or a server process) requested a system resource — typically or a semaphore — and the OS denied the request due to a temporary shortage.

Oracle processes use semaphores for inter-process locking. If the system runs out of available semaphores (e.g., too many Oracle instances or processes), the OS returns EAGAIN . Ora-27103 Internal Error Svr4 Error 11 Resource Temporarily

If you are an Oracle Database Administrator (DBA) working on Unix/Linux-based systems (Solaris, AIX, Linux), you might occasionally encounter the cryptic error: In plain terms: An Oracle background process (e

Immediately after the error, look for preceding messages like: too many Oracle instances or processes)