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Don Burleson Blog 







ORA-27300: OS System Dependent Operation: fork failed with status: 11

Expert Oracle Database Tips by Donald BurlesonFebruary 16, 2015


Question:  I received the following ORA-27300 error in my alert log:

ORA-27300: OS system dependent operation:spcdr:9261:4200 failed with status: 997
ORA-27301: OS failure message: Overlapped I/O operation is in progress

ORA-27302: failu
re occurred at: skgpspawn

Process startup failed, error stack:
Errors in file /u01/home/oracle/diag/rdbms/xxxx.trc:
ORA-27300: OS system dependent operation: fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5

How do I deal with this ORA-27300 error?

Answer:  To diagnose any error, you first start by using the oerr utility to display the ORA-27300 error:

ORA-27300: OS system dependent operation: string failed with status: string

Cause:  OS system call error

Action: Contact Oracle Support

I noted that the maximum user process for this server was set to 2047 and when I check the total number of process it is reaching the OS limit, causing the ORA-27300 error. We need to check the "processes" Oracle parameter to ensure that it is large enough and we also need to increase the process limit to fix the ORA-27300 error and here are the commands for each OS:

Linux:  Increase the nproc in /etc/security/limits.conf file

Solaris 10:  Increase the project.max-lwps value

For HP and Solaris:  Increase the maxuprc

For AIX:   Increase maxuproc


- Oracle Support advises that there is a bug: BUG 5607984 - ORACLE DOES NOT CLOSE TCP CONNECTIONS. REMAINS IN CLOSE_WAIT STATE. on Windows 32-bit.

- Patch number 5639232 that Oracle Support can provide is supposed to solve the problem for  This bug is also supposed to be solved in the patchset that is available on the Metalink site.


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