When operating system is encountering with some unknown error like insufficient space in temp Area or swap Area or insufficient system resources then Oracle throws following errors.
Error:
ORA-27300: OS system dependent operation:fork failed with status: 2
ORA-27301: OS failure message: No such file or directory
ORA-27302: failure occurred at: skgpspawn5
Solution:
On System: maxproc 128 to 16384
ora11g@abc_test# lsattr -E -l sys0 | grep -i maxuproc
maxuproc 16384 Maximum number of PROCESSES allowed per user True
On DB: process 150 to 300
SQL> show parameter proce
processes integer 300